Li Ying-hui

Li Ying-hui
Southwest Jiaotong University · School of Mechanical Engineering

PhD

About

98
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777
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January 2005 - December 2016
Southwest Jiaotong University
Position
  • Professor (Full)

Publications

Publications (98)
Article
Curved beams that have advantages of excellent bearing capacity and beautiful appearance are widely applied in various engineering constructions. This paper studies nonlinear forced vibration of a multi-cracked Euler-Bernoulli curved beam (ECB) with damping effects and derives the closed-formed analytical solution of steady-state forced vibration o...
Article
This paper established dynamic model of forced vibration of the curved piezoelectric energy harvesters with cracks. The Green’s function of piezoelectric curved beam with cracks is obtained based on analytical solutions of vibration equation of the electromechanical coupled Prescott models and continuity conditions at crack sections. The system equ...
Article
This paper focuses on reviewing some classical soil-structure interaction models (SIMs) based on different superstructures and soils and strives to establish the relations between the soils and SIMs according to the American Society for Testing and Materials (ASTM) D2487-11 standard for soil classification. The SIMs with different superstructures,...
Article
Vibration energy harvesting problems have strongly developed in recent years. However, many researchers just consider bending vibration models of energy harvesters. As a matter of fact, torsional vibration is also important and cannot be ignored in many cases. In this work, closed-form solutions of bending-torsion coupled forced vibrations of a pie...
Article
In this study, the impact of in-plane inertial disturbance from environment on the dynamical behavior of a functionally graded (FG) rectangular plate is discussed. The inertial disturbance is modeled as a parametric excitation. The dynamical model of FG plate subjected to an uniaxial inertia force of an in-plane disturbance are developed according...
Article
This paper concentrates on obtaining the closed-formed analytical solutions of the steady-state forced vibration of the multi-cracked Timoshenko beams with damping effects. Varying from the Euler-Bernoulli beam, the mechanical properties of a cracked section of the Timoshenko beam are described as a rotational spring and a transversal spring models...
Article
Full-text available
In this work, a multifunctional microporous metal-organic framework (MOF), [Cd(ABTC)(H2O)2(DMA)]·4DMA (JLNU-4; JLNU = Jilin Normal University; H4ABTC = 3,3′,5,5′-azobenzenetetracarboxylic acid), has been synthesized based on the ligand H4ABTC under solvothermal conditions. JLNU-4 shows excellent uptake of iodine both in solution and in the vapor ph...
Article
Full-text available
In this article, closed-form solutions are obtained for vibrations of a magneto-electro-elastic beam with variable cross section. Based on Timoshenko beam assumptions, governing equation for the non-uniform beam with exponentially varying width is obtained. Laplace transform approach applied to the governing equation results in the corresponding Gr...
Article
Flapwise vibration characteristics of a rotating laminated composite beam under hygrothermal environment are studied in this paper. The governing equation of the flapwise vibration for the rotating beam under hygrothermal environment is obtained applying D’Alembert’s principle, in which the design parameters such as setting angle and pitch angle ar...
Article
Full-text available
The current paper is concerned with the micro-scale laminated composite Euler-Bernoulli beams under the hygrothermal environment. The aim is mainly focused on the static and dynamical responses of micro-scale beams under consideration in both prebuckling and postbuckling cases. Meanwhile, the mechanism how temperature and hygrothermal concentration...
Article
Non-linearly parametric resonances of an axially moving viscoelastic sandwich beam are investigated in this paper. The beam is moving with a time-dependent velocity, namely a harmonically varied velocity about the mean velocity. The partial differential equation is discretized into nonlinear ordinary differential equations via the method of Galerki...
Article
This paper strives to obtain the explicit expressions of steady-state temperature and displacement responses for the coupled thermoelastic vibrations of the cracked Euler-Bernoulli beams subjected to a heat flux. The mechanical properties of cracked sections of the beam are characterized by local stiffness models available in literature. Damping ef...
Article
In this article, the closed-form solutions are obtained for the forced vibrations of cantilevered unimorph piezoelectric energy harvesters. A tip mass is attached at the free end, and the moment of its inertia to the fixed end is considered. Timoshenko beam assumptions are used to establish a coupled electromechanical model for the harvester. Two d...
Article
This paper focuses on the free vibration characteristics of a spinning composite thin-walled beam under hygrothermal environment. Based on the constitutive relation of single layer material subjected to hygrothermal environment, the dynamic equations of the spinning composite thin-walled beam are built by Hamilton's principle. The solution of the d...
Article
Full-text available
In this article, the numerical simulation of a 2.0-MW wind energy converter coupling is achieved by three-dimensional computer-aided design modeling technique and finite element method. The static performances and the buckling characteristics of the diaphragm coupling are investigated. The diaphragm coupling is divided into three substructures, nam...
Article
In this paper, explicit expressions of the steady-state responses of a cracked Euler-Bernoulli beam submitted to a harmonic force are presented. The mechanical properties of cracked sections of the beam are characterized by local stiffness models available in literature. Fundamental dynamic response of a beam with one crack is obtained by means of...
Article
Full-text available
Based on Euler-Bernoulli beam theory and a continuous stiffness beam model, the free vibration of rectangular-section beams made of functionally graded materials (FGMs) containing open edge cracks is studied. Assuming the material gradients follow exponential distribution along beam thickness direction, the conversion relation between the vibration...
Article
Nonlinear aeroelastic structural dynamics of wind turbine blades is analyzed with emphasis on an often met 1:2 internal resonance that appears at in-plane and out-of-plane fundamental modes. Based on Euler-Bernoulli beam theory and Hamiltonian principle, a mathematical model for blade motion is introduced by considering gravitational, Coriolis, aer...
Article
The bifurcation behaviors of a railway vehicle system with a complex nonlinear wheel-rail contact relation were investigated using the methods of increasing speed and decreasing speed. It was shown that two hunting motions with similar amplitudes coexist in the system; there are some differences between the coexistence of multiple hunting motions a...
Article
Full-text available
Iron pellets are often added in blades to maintain moment balance in the design process of a wind turbine. The balance weight will change the natural vibration characteristics of the wind turbine blade. Resonant frequencies may appear for this reason, so it is necessary to study the effects of balance weight on the dynamic characteristics of a blad...
Article
The isotope analyses of the helium-rich natural gas based on 22 wells of the Weihe Basin show that the helium gas belongs to crust-derived helium with a little mantle-derived one. Based on analyzing anomalies of helium and characteristics of the Weihe Basin, the authors summarized three impact factors of helium anomalies in the Weihe Basin: (1)high...
Article
Nonlinear normal modes of infinitely long functionally graded cylindrical thin shells with internal resonance in thermal environment were studied. The condition of internal resonance was obtained. The nonlinear modulation equations with internal resonance were established using the multiple scale method. The effects of gradient exponent, temperatur...
Article
This paper is concerned with the dynamic solutions for forced vibrations of Timoshenko beams in a systematical manner. Damping effects on the vibrations of the beam are taken into consideration by introducing two characteristic parameters. Laplace transform method is applied in the present study and corresponding Green's functions are presented exp...
Article
An investigation on the nonlinear aeroelastic behavior of a wind turbine blade with both external and internal resonances is presented. The external resonance is a primary resonance that appears at the first flapwise mode; it can cause severe damage to blade. The internal resonance happens at the first two flapwise modes; it can enhance the energy...
Article
In consideration of the shortcoming of traditional sandwich beam theory that the sandwich beam is assumed to be incompressible in thickness direction, a new sandwich beam theory was proposed by introducing independent variables in terms of the displacements of top face sheet, middle plane of soft core and bottom face sheet. The displacement of soft...
Article
Lagwise dynamic characteristics of a wind turbine blade subjected to unsteady aerodynamic loads are studied in this paper. The partial differential equations governing the coupled longitudinal-transverse vibration of the blade with large bending deflection are obtained by applying the Hamiltonian principle. The modal problem of the coupled vibratio...
Article
A mathematical model describing the nonlinear vibration of horizontal axis wind turbine (HAWT) blades is proposed in this paper. The system consists of a rotating blade and four components of deformation including longitudinal vibration (named axial extension), out-of-plane bend (named flap), in-plane/edgewise bend (named lead/lag) and torsion (nam...
Article
Mode interaction and energy exchange in nonlinear free vibration of functionally graded cylindrical thin shells is studied according to Hamiltonian dynamics. Equivalent material properties of functionally graded material are described as power-law distribution function. The kinetic and potential energy expressions of functionally graded cylindrical...
Article
Full-text available
This paper presents an analysis for the nonlinear in-plane motion of wind turbine blade under the combined action of parametric and forced excitations. The Bernoulli-Euler beam theory is adopted to describe blade motion. Effects including gravity, structural damping and geometric nonlinearity are included in the mathematical model. The rotating spe...
Article
The transverse vibration characteristic of the viscoelastic sandwich beam with axial speed is studied under the coupled temperature field and displacement field. Based on the theory of Euler - Bernouli beam and the constitutive relation of Kelvin viscoelastic material model, the transverse vibration equation of the axially moving beam is establishe...
Article
A new sandwich beam theory is proposed by introducing independent variables of the displacements of face sheets, middle plane of soft core according to the incompression in transverse direction of traditional sandwich beam theory. Based on Hamilton principal, the governing equation of the system is established. Galerkin truncation method was used t...
Article
Hydrocarbon resource exploration of the Cretaceous strata in Nanxiang basin has been rarely carried out. Through research on mining geology and geochemical oil and gas exploration in the study area, the authors obtained some information of Cretaceous hydrocarbon source rock in Xiangfan-Zaoyang sag: the salt wells in the eastern part of the sag show...
Article
A two-axle railway bogie model is taken as the research object due to its complicated dynamics. The nonlinear relationship between the creepage and creep forces in the ideal wheel-rail contact area is decided by Shen's creep theory, and the flange force is expressed by a piecewise linear function. The continuation method is used to compute the stat...
Article
Based on the bifurcation and stability theory of dynamical systems, the symmetric/asymmetric bifurcation behaviours and chaotic motions of a railway bogie system under a complex nonlinear wheel–rail contact relation are investigated in detail by the ‘resultant bifurcation diagram’ method with slowly increasing and decreasing speed. It is found that...
Article
Full-text available
The purpose of this paper is to reveal the strong topological structures on finite di-mensional probabilistic normed spaces. The notions of the absorbed exponent and the absorbed function are introduced. Some properties of the absorbed exponent and the absorbed function are obtained.The classification for the strong topolog-ical structures is given...
Article
The vibration and response analysis of rotating viscoelastic sandwich beam was presented. The vibration equation of the rotating viscoelastic sandwich beam was established based on Kelvin-Voigt constitutive equation and large deflection theory. Partial differential equation was transformed into ordinary differential equation using Galerkin method....
Article
By taking a railway passenger car system as a studying object, the vehicle was simplified as a multiple-rigid-body system composed of one carboy, two bogie frames, four wheel sets, and primary and secondary suspensions. The rails were modeled as discrete rigid bodies with lateral stiffness and damping, moving forward with their corresponding wheel...
Article
The concept of symmetric bifurcation for a symmetric wheel-rail system is defined. After that, the time response of the system can be achieved by the numerical integration method, and an unfixed and dynamic Poincaré section and its symmetric section for the symmetric wheel-rail system are established. Then the ‘resultant bifurcation diagram’ method...
Article
The Carboniferous-Permian lithologic association of Xiangtan 9 well in Ejin Banner is composed of volcanic rocks and clastic rocks, the concordia ages of volcanic zircon are from 302.2Ma±7.8Ma to 319.9Ma±4.5Ma, which shows that the stratigraphic age is late Carboniferous. The lithologic association is consistent with that of Ganquan Formation along...
Article
Based on an analysis of geochemical characteristics of Variscan weathered crust crude oil from Xiangtan 8 well, the authors hold that the crude oil bears the characteristics of high saturated hydrocarbon, low aromatic, no hydrocarbon and asphaltene, and light carbon isotope of the whole oil, and the hopanoid series of biomarkers bears the character...
Article
The flapwise dynamic response of a rotating wind turbine blade in super-harmonic resonance is studied in this paper, while the blade is subjected to unsteady aerodynamic loads. Coupled extensional–bending vibrations of the blade are considered; the governing equations which are coupled through linear and quadratic terms arising from rotating and ge...
Article
Based on the theory of small deflection of thin plate and the constitutive description of Kelvin-Viogt viscoelastic material, the controlling equation which dominates the transverse vibration of the axially moving viscoelastic sandwich plate was established, followed by the study of the transverse vibration characteristic. One-mode and two-mode eig...
Article
The nonlinear governing equation of flap vibration is established by considering the blade as a rotating Euler-Bernoulli cantilever beam with variable sections on the hub. The unsteady aerodynamic forces acting on the blade are derived by using the Greenberg's expressions. Considering the bending rigidity and line density are variable along the ela...
Article
The nonlinear dynamical response of a sandwich beam subjected to impact loadings, which is composed of leaf metal and compressible soft material, is studied in this paper. Firstly, based on Hamilton principle, the nonlinear dynamic control equation of the system is established; then, the calculation formula for a simple beam is developed based on G...
Article
Vibration analysis of axially moving viscoelastic sandwich plate was presented. Based on the theory of small deflection theory of plate and Kelvin-Viogt constitutive equation, the control equation of the axially moving viscoelastic plate was established. Partial differential equation was transformed into ordinary equations by using Galerkin truncat...
Article
An analytic solution for bending vibration of stepped beam was developed. Based on Euler-Bernoulli beam theory, the transverse oscillation equation of stepped beam was derived firstly. For studying stepped beam, the relation of modal functions of contiguous steps was derived by using the conditions for continuity of displacement, slope of deflectio...
Article
In this paper, the nonlinear dynamic model of a thermo-mechanical coupling viscoelastic rectangular plate is established. This plate is with varied temperature field and subjected to both actions of an alternating periodic transverse external excitation and in-plane uniform distributed force. The influence of heat conduction, thermal expansion and...
Article
Transverse vibration of an axially moving viscoelastic sandwich beam is investigated in this paper. Based on the Kelvin constitutive equation, transverse controlling equation is established. First of all, the multiple scales method is applied to obtained steady-state response. Elimination of scales terms will give us the amplitude of vibrations. Ad...
Article
High-concentration helium in petroleum well, geothermal well and water well in Weihe basin has been found with very high volume fraction helium. The abundance of the helium isotope 3He/4He is (2.1-76.0)×10-8, and it belongs to crust-derived helium. Small amount of the samples has mantle-derived helium, and they form special natural gas of crust sou...
Article
According to the gas sample from geothermal wells in Weihe Basin, combined with geological analysis results, it is held that there are the pyrolysis-cracking methane gas and the CO 2 gas of organic genesis related to upper Paleozoic coal strata. Regional geology and seismic research results confirm that there are upper Paleozoic strata in the base...
Article
Aim-to confirm the basin-and-range structural framework evolvement and provenance system of Carboniferous to Permian in Badanjaran basin. Method-by analyzing the content and the combined characteristic of clastic heavy mineral in sections of different depression belts of Carboniferous to Permian. Results-most of the heavy minerals in Badanjaran bas...
Article
The authors studied petrologic characteristics of main rocks by such means as profile measurement of Permian Maihanhada Formation in Yagan area of Ejin Banner, thin section analysis, fossil identification and X-diffraction as well as trace element, clay mineral and heavy mineral analysis. The sedimentary environment of Maihanhada Formation was stud...
Article
In order to study diagenetic characteristics of Maihanhada Formation in the study area with two measured sections of Hangwula and Maihanhada as examples, the authors employed such means as thin section identification, cathode luminescence, X-ray diffraction analysis, inclusions temperature testing and scanning electron microscope in combination wit...
Article
This research aims at analyzing the relationship between the geothermal evolution of Permian source rocks and hydrocarbon generation in Ejin Banner and its vicinities. Based on the information of vitrinite reflectance, temperature data of liquid-phase inclusions and apatite fission tracks, the authors measured the paleogeothermal gradient of Ejin B...
Article
Based on a study of the characteristics of Carboniferous-Permian basin basement structure, lithostratigraphy, sedimentary evolution and planar sedimentary facies, the authors consider that the Carboniferous-Permian basin of Ejin Banner and its vicinities is a uniform rift basin: there existed onlap sedimentation from north to south during Early Car...
Article
Based on the geological condition analysis of surface geochemical prospecting for oil and gas in Ejin Banner and its vicinities, the authors systematically analyzed such indexes as concentrations of methane and heavy hydrocarbon, dry coefficients and methane carbon isotope. There exist high hydrocarbon background values and strong hydrocarbon anoma...
Article
Based on an analysis of Mesozoic-Cenozoic sedimentary evolvement and a study of structural reformation after Carboniferous-Permian and Mesozoic magmatism, the authors hold that Cretaceous was a flourishing period of Yingen-Ejin Benner basin evolution: there existed the combination of lacustrine facies-swamp facies sandstone and mudstone characteriz...
Article
Based on a study of the sedimentary evolution, hydrocarbon generation conditions, reservoir conditions, source-reservoircap rock combinations and preservation conditions, the authors hold that there exist favorable petroleum geological conditions in Carboniferous- Permian strata of Hexi Corridor region, and Carboniferous-Permian are new strata wort...
Article
Based on an analysis of basalt geochemical characteristics of Amushan Formation (western Ganquan Formation) of Upper Carboniferous Xiaodushan Stage-Lower Permian Zisong Stage and the basalt type, this paper deals with the rock characteristics and tectonic environment. Previous studies have already revealed the basic type of Carboniferous-Permian ba...
Article
Based on a study of the lithologic association, vertical characteristics of sedimentary facies and regional sedimentary distribution of Amushan Formation in Manghanchaoke region, the authors hold that the flourishing period of Badanjilin marine rift basin was the sedimentary period of Amushan Formation, during which the shallow marine shelf facies...
Article
Based on the characteristics of vertical variation and plane distribution of Carboniferous-Permian clastic rock sedimentary facies, petrological features, diagenesis and pore types, the authors hold that the development degree and compositional and structural maturity of Carboniferous-Permian glutenite are controlled by two sedimentary derivations...
Article
Based on the study of lithologic characteristics and oil and gas geochemical features of dark mud shale in the Lower Permian Maihanhada Formation in Hangwula region of Alashan Right Banner, the vertical distribution, organic matter abundance, kerogen type and thermal evolution of the source rocks are summarized here. The total thickness of the enri...
Article
We investigate the kinematics and dynamics of a high-speed four-axle railway passenger can which has 17 degrees of freedom, considering the lateral motion, roll and yaw angles of the car body and the bogie frame, and the lateral motion and yaw angle of the four wheelsets. The creep forces and the flange forces between the oscillating wheels and the...
Article
A multiple fields’ coupled model of new magnetic controlled DC plasma torch, which was used for CVD diamond film, was presented. In this model, the effects of electric field and magnetic field on the flow field and temperature field were taken into account, and the fluid dynamics equations were modified by the addition of some source terms relating...
Article
Through comprehensive evaluation for Carboniferous hydrocarbon source rocks distribution, organic matter abundance, types and maturity, it is considered that there are widespread source rocks of dark mudstone and carbonaceous mudstone in Hexi Corridor region, and the hydrocarbon source rocks have the characteristics of large thickness, high abundan...
Article
In order to understand the genesis of carbon dioxide gas in the Shangdou region for the guidance of carbon dioxide gas exploration, by means of the carbon dioxide gas geochemical analysis such as gas component, carbon isotope, helium isotope and hydrogen isotope, the characteristics are the carbon dioxide concentration is 97.23%-97.85%, the value o...
Article
In order to understand the distribution of Carboniferous-Permian in Ejina Banner and its vicinities, and provide evidence for oil and gas resources investigation and evaluation, through fine processing and interpretation of previous data and newly finished integrated geophysical survey sections, by using joint inversion of gravity, magnetic and ele...
Article
Through analyzing the hydrocarbon shows statistics, gas components of drilling mud and methane carbon isotope of different Formations, including Cretaceous Ejina Banner Formation, Jurassic Mamuwusu Formation and Paleozoic superface weathered crust of X well in Ejina Banner region, we suggest that Jurassic and Cretaceous have the same hydrocarbon sh...
Article
Based on preliminary study of distribution, lithologic features and sedimentary environment of Carboniferous-Permian in Ejina Banner and its vicinity, the paper mainly take studies on distribution of source rocks, organic matter abundance and thermal evolution history, combining with the evaluation of reservoir, cap and preservation conditions, the...
Article
Many researches indicate that the carbon isotopic composition of kerogen in hydrocarbon source rocks is mainly affected by kerogen types, and the composition can be used as an important evaluation index of hydrocarbon source rocks types, sedimentary environment and oil and gas source correlation. This method has been widely applied. Through the res...
Article
Based on the study on the lithologic features and hydrocarbon geochemical characteristics of dark mudstone and shale of Permian Maihanhada Formation, the authors summarize longitudinal distribution of source rocks, organic matter abundance, kerogen type and thermal evolution characteristics. The source rocks of Permian Maihanhada Formation are cent...
Article
Laboratory flume experiments were undertaken to measure the vertical profiles of mean flow velocities for two different flow discharges and four different densities of Hydrilla beds. These data were also used to calculate three hydraulic parameters, i.e., Manning's roughness coefficient, the Reynolds number, and the Froude number. Results show that...
Article
The main gas component of gas reservoir is carbon dioxide, the content of carbon dioxide is 87.0%~99.9%, the value of δ 13C is -6.5‰~-5.2‰, the volume ratio of 3He to 4He is (1.69~3.35)×10 -6, which shows that the gas is typical carbon dioxide gas of mantle origin. The Wulanhada-Gaowusu fault is a long-term active super-deep fault, which not only c...
Article
Xiangfan-Zaoyang sag lies on the south of Nanxiang basin. Compared with the northern small but prolific Nanyang and Biyang sags, the breakthrough of exploration activity is always obtained in this area. Through the research on the characteristics of Cenozoic Hetaoyuan group source rock and the hydrocarbon resource evaluation, we know that the sourc...
Article
Full-text available
The objective of this study was to evaluate the efficiency of the closed pulled straw (CPS) method for cryopreserving in vitro-produced and in vivo-produced bovine (Bos taurus) embryos. Based on the open pulled straw (OPS) protocol, the top end of a CPS was closed by tweezers (heated in a flame) to prevent the cryoprotectant medium containing embry...
Article
Based on the analytical solution of Zhang method for a straight pile under lateral loads, the squeezed branch and plate pile is divided into different parts in accordance with the diameter of each part, and using analytical solution of Zhang in every part. Using the deformation compatibility conditions on common points, boundary conditions and init...
Article
Based on the simplified parameter-lumped dynamical model which dominates the vertical vibration of wheel-rail system, the state equations of the wheel-rail coupling nonlinear dynamic model are derived, in which the Hertz nonlinear contact force is adopted to simulate the wheel-rail interactions. The self-adapted Runge-Kutta method is used to solve...
Article
A six-axle locomotive with simple nonlinearities was taken as the study object. The creep forces and the flange forces between wheels and rails in rolling contact were decided by the Vermeulen-Johnson creep force laws and piecewise function respectively. The hunting motion and bifurcation behavior of the locomotive running on ideal straight and per...
Article
In order to understand deposit characteristics, grade quality and exploration prospects of the Chang 7 oil shale mineral deposit in Yanchang Formation and provide a reference for further investigating oil shale in the Hejiafang area, Shannxi Province, the author has studied metallogentic background of the Triassic oil shale in the Hejiafang area an...