No full-text available
To read the full-text of this research,
you can request a copy directly from the authors.
Static Behaviour of Engine Mounting Bracket
Abstract
In this work an attempt was made to analyse the engine mounting bracket. Design includes the modelling of the engine mounting brackets by taking into account all packaging constraints. Analysis includes Static Analysis of engine mounting bracket. The main purpose of this study is to examine the natural frequency of by analytically and through developing the model and self excitation frequency of engine bracket. An attempt was made to check whether the natural frequency of engine mounting bracket is less than self excitation frequency of engine bracket. Hence this work is carried by using ERW-1, ERW-2, aluminium and magnesium alloys for the engine mount bracket. The results are analysed for stresses and deformations.
... Computational fluid dynamics generally known as CFD is the progressive research tool for analysis and evaluation for various types of mechanical parts designed by the mechanical industries or automobile sector. The main purpose of the CFD, using as the research tool is that to impart a forum for the cross fertilization of the ideas, tools, techniques and with the imposement of aeronautical science, geophysics and environmental science12. This is applicable for all the disciplines where fluid flow is taken into an account. ...
... Implicit or semi implicit methods are generally used for integrating the ordinary differential equations which leads to produce a system usually non linear equation[14]. So by applying NEWTON and PICARD'S iteration, which will then produces a system of linear algebraic equation which is non symmetric in the presence of advection and indefinite in the presence of the incompressibility[1]. ...
... The need for light weight structural materials in automotive applications is increasing as the pressure for improvement in emissions and fuel economy increases. The most effective way of increasing automobile mileage while decreasing emissions is to reduce vehicle weight[1,16]. The noise and vibration occur because the power that is delivered through bumpy roads, the engine, and suspension result in the resonance effect in a broad frequency band. ...
This current article accounts for the analysis of engine mounting bracket by using Computational fluid dynamics technique. ANSYS software was used for the analysis purpose and results are so obtained pertaining to the optimized level. This paper gives the little idea about the new modern techniques used in the CFD and view progress that has been made the over the distance revolution in the field of engineering with the reinforcement of new modern technologies recently developed. It so addresses the scientist, engineers and mathematician who are willing to deal with the field of computational fluid dynamics. The results were analyzed for stresses and deformations. The design was tested for different materials like Aluminium, ERW-1 and ERW-2 along with suitability of material.
... Brackets are widely used connection components in the automotive and many other industries [1,2]. In vehicles, brackets provide critical mechanical functions such as mounting the engine to the chassis, in stabilising the engine, and isolating or reducing engine vibration [3][4][5][6]. Vibration control, besides providing mechanical advantages, offers a more comfortable driving experience to the passenger compartment by reducing the transmission of vibrations to the interior of the vehicle [7]. ...
... the system are specified for each response variable. The objective function for design generally includes factors such as material weight, cost, or volume [4]. ...
In this study, mass reduction of an engine mounting bracket has been performed without changing the failure mode. Firstly, failure modes were determined experimentally using failure loads provided by the vehicle manufacturer. Then critical stress concentration areas and suitable mass reduction regions were determined by using Finite Element Analysis (FEA) for these load cases. A structural optimisation process was carried out using Design of Experiment-Response Surface Methodology (DOE-RSM) to minimise the mass while keeping the failure load as constant as possible. When the stress values obtained from the preliminary structure are compared with the values obtained from the optimised part, it was seen that this target has been mostly achieved. A total mass reduction of 4.31 % was achieved in the new part through failure mode analysis. Furthermore, it was found that a financial saving of 129,000 Euro could also be achieved.
... In an automotive vehicle, the engine rests on brackets which are connected to the main-frame or the skeleton of the car. Hence, during its operation, the undesired vibrations generated by the engine and road roughness can get directly transmitted to the frame through the brackets [1]. Engine mounts have great effect on the noise and vibration harshness (NVH) characteristic and has to withstand large levels of vibration due to the nature of the use of the machine [2]. ...
... The need for light weight structural materials in automotive applications is increasing as the pressure for improvement in emissions and fuel economy increases. The most effective way of increasing automobile mileage while decreasing emissions is to reduce vehicle weight [1,4]. The noise and vibration occur because the power that is delivered through bumpy roads, the engine, and suspension result in the resonance effect in a broad frequency band. ...
Engine mounting bracket plays very significant role in reducing noise, vibration and harshness caused due to engine and thus has very effective role in improving vehicle comfort. This current article accounts for the investigation of engine mounting bracket by using ANSYS. Static and modal analysis of engine mounting bracket was done in order to investigate whether the current natural frequency of engine mounting bracket is lower than that of self excitation frequency of bracket. It was found that circular cross section having stress induced 128.47MPa is more reliable than square cross section. The results were analyzed for stresses and deformations. The design was tested for different materials like Magnesium, ERW-1 and ERW-3 along with suitability of material. Stresses induced in magnesium bracket were 64.07 MPa with the deformation of 1.20 mm. It can be anticipated that magnesium brackets are corrosion resistant and can be considered for desired application. Stiffness of ERW-3 material was found better than magnesium and can be used for required application.
... In an automotive vehicle, the engine rests on brackets which are connected to the main-frame or the skeleton of the car. Hence, during its operation, the undesired vibrations generated by the engine and road roughness can get directly transmitted to the frame through the brackets [1]. Engine mounts have great effect on the noise and vibration harshness (NVH) characteristic and has to withstand large levels of vibration due to the nature of the use of the machine [2]. ...
... The need for light weight structural materials in automotive applications is increasing as the pressure for improvement in emissions and fuel economy increases. The most effective way of increasing automobile mileage while decreasing emissions is to reduce vehicle weight [1,4]. The noise and vibration occur because the power that is delivered through bumpy roads, the engine, and suspension result in the resonance effect in a broad frequency band. ...
In this work an attempt was made to analyse the engine mounting bracket. Design includes the modelling of the engine mounting brackets by taking into account all packaging constraints. Analysis includes Static and Dynamic Analysis of engine mounting bracket. The main purpose of this study is to examine the natural frequency of by analytically and through developing the model and self excitation frequency of engine bracket. An attempt was made to check whether the natural frequency of engine mounting bracket is less than self excitation frequency of engine bracket. Hence this work is carried by using ERW-1, ERW-2, aluminium and magnesium alloys for the engine mount bracket. The results are analysed for stresses and deformations. Key Words: ANSYS, static structure, ERW-1 steels, ERW-2 steels.
... This machine employs a construction methodology that utilizes cast-in-situ beams spanning 32.7 m and can handle single-span beams weighing up to 900 tons [1]. A critical component, the support bracket, serves as the structural foundation for the movable framework of the bridge fabrication machine [2,3]. Two identical sets of brackets, each comprising left and right components, anchor into pier side holes to transfer vertical forces [4]. ...
This study aims to evaluate the vibration and response performance of the core component support bracket in the DXZ32/900 oceanic bridge fabrication machine (movable formwork) to provide a foundation for its structural optimization. A finite element model of the support bracket is established, and three analyses are conducted: modal analysis to determine inherent frequencies and vibration modes, harmonic response analysis to evaluate steady-state behavior under sinusoidal loads, and transient dynamic analysis to assess displacement responses to dynamic loads. The frequency distribution indicates that the natural frequencies are densely packed without abrupt jumps, reflecting the complexity of the dynamic performance of the support bracket. Moreover, frequencies below the fourth order exhibit minimal deformation and limited impact on the overall dynamics. Sensitivity analysis is conducted to evaluate the impact of sectional parameter optimization on material efficiency and dynamic performance, ensuring robust design improvements. In summary, the findings reveal key vibration characteristics and response patterns, providing theoretical insights to guide the improvement of the support bracket and ensure the safety and efficiency of the bridge fabrication machine.
... Similarly, static and modal analysis was done by Adkine A.S. et al, 2015 [7] of engine mounting bracket. They examined the natural frequency of engine bracket analytically and through developing the model and self excitation frequency of engine bracket. ...
This review paper is focused on the application of modelling techniques for engine vibration analysis. The application of modeling based analysis is very important to develop and analyze models and predicting different types of engine generated vibrations. It is also useful for predicting the nodal displacements, stress generated, frequencies in term of Eigen values, and Mode shapes. The review initially focuses on finite element analysis as most popularly used investigation technique for the analysis of engine developed vibrations .Recent researches on FEA simulations are performed using ANSYS, HyperMesh ABACUS solver, COMSOL, HyperMesh OptiStruct solver. Besides FEA, mathematical modeling of developed models is done by researchers using tools like MATLAB, Directed Tabu Search (DTS), leap frog method etc. This comprehensive review of the various modeling techniques for engine vibration analysis will be useful for academician, scientist and researchers working for selection of most appropriate and viable technique for engine vibration analysis analysis. IndexTerms:-Engine Mountings, vibration analysis, simulation, FEA, mathematical modeling. INTRODUCTION One of the biggest challenges in today's automotive development which is faced is lowering the fuel consumption of the vehicles. Considering the desirable feature of sports car which primarily consists of speed, racing ability and its performance. One obvious way to increase the fuel efficiency of a vehicle is to reduce its mass. But reduced masses result in increasing problems with vibrations and the dynamical behavior in general. More vibrations mean additional wear and reduction in comfort and the comfort is an important quality characteristic which can influence the customers purchase decision. The main sources of vibrations in vehicle are the engine induced vibrations. Some of parts are identified by the researchers and engine manufacturers as the vibration producing parts. The prime initiator of vibration source are components like engine block, engine head, piston, connecting rod, crank shaft, flywheel and cam shaft, valves, manifolds, pulleys etc [26], these excites engine vibrations. Due to faulty design and poor manufacturing there is unbalance in the engines which causes excessive stresses in the rotating system because of vibration. The vibration also leads to rapid wear of contact parts such as bearings and gears. Unwanted vibrations may cause loosening of parts, damage frame and engine mounting due to stress, the consequences of which may be premature failure and reduction in service life of the product. Simulation is basically a process, in which any creation and existing design is analyzed before its practical application. In simulation, analysis is done by static analysis, modal analysis, dynamic analysis for determination of design and application parameters like stress, displacement, fatigue life, thermal conductivity etc. In present, many simulation and CAD software are available for various field, i.e. mechanical engineering, electrical engineering, civil engineering, medical science etc. In IC Engine generally simulation is performed to predict the behavior of combustion chamber, flow of fluid (gas, mixture), temperature and vibration.
... While in operation, the unsought stresses and vibrations generated by the engine and road roughness can transmitted to the frame directly through the brackets. These vibrations may cause discomfort to the passenger sitting inside the vehicle or might even damage the chassis of the vehicle [6]. ...
One of the essential parts of an auto vehicle is an engine mounting bracket, which helps in mounting the engine on the chassis. This paper analyses and compares the existing bracket design of one of the famous three-wheeler of Scooter India limited named as Vikram 750 D with five new alternative models using finite element analysis. In the first part, linear structural finite element analysis of engine mounting bracket of the existing design was carried out to determine the maximum stresses and deformations in the existing model and then identical analysis was conducted for five proposed models of the mounting brackets. The maximum stresses and deformations of the proposed models were compared with that of the existing model to identify a better design. The weight of the existing model and five proposed model were also compared to obtain an optimal design.
... The stress analysis of plates perforated by holes in square pitch pattern has been analyzed by using the photo elastic method finite element method (Patil et al., 2013 solution is presented for three-dimensional thermo mechanical deformations of a simply supported functionally graded (FG) rectangular plate subjected to time-dependent thermal loads on its top and/or bottom surfaces (Senthil et al., 2003 and nonlinear stress analysis of piezolaminated CNTs/fiber/polymer composite (CNTFPC) plates under a combined mechanical and electrical loading are investigated (Rafiee et al., 2014). Static behavior of engine mounting bracket was analyzed using finite element analysis method (Adkine et al., 2015). Design optimization of the Mounting Bracket for aerospace vehicle to reduce the weight to a large extent by maintaining High Factor of Safety ( 2014). ...
Refrigerated air dryers are basically a refrigeration system which is used to remove water vapor from compressed air. Refrigerator, heat exchanging unit are to be placed in a canopy which is affected by static and dynamic stresses acting on it. In this pa been analyzed using finite element analysis method with various approaches for the same loading condition. From the analysis results it is concluded that the varies with introducing circular disc on the bottom of the canopy, base can obtain high withstanding capacity of canopy base comparing with other two approaches.
... The stress analysis of plates perforated by holes in square pitch pattern has been analyzed by using the photo elastic method finite element method (Patil et al., 2013 solution is presented for three-dimensional thermo mechanical deformations of a simply supported functionally graded (FG) rectangular plate subjected to time-dependent thermal loads on its top and/or bottom surfaces (Senthil et al., 2003 and nonlinear stress analysis of piezolaminated CNTs/fiber/polymer composite (CNTFPC) plates under a combined mechanical and electrical loading are investigated (Rafiee et al., 2014). Static behavior of engine mounting bracket was analyzed using finite element analysis method (Adkine et al., 2015). Design optimization of the Mounting Bracket for aerospace vehicle to reduce the weight to a large extent by maintaining High Factor of Safety ( 2014). ...
Refrigerated air dryers are basically refrigeration system which is used to remove water vapor from compressed air. In this work the load carrying capacity of canopy base has been analyzed. Refrigerator, heat exchanging unit are to be placed in a canopy which has affected by static and dynamic stresses acting on it. Using alternative approaches the load carrying capacity of the canopy base has been analyzed. Finally adding circular disc and one rib on the back side of the base provide high load carrying capacity compare to other approaches
Bracket is one of the important components of an engine mount assembly, heavy performance truck has their engine supported by bracket and this engine mounting brackets assembly is used in chassis front frame which has been designed as a framework to support engine along with transmission member. The main function of the engine mount bracket is to properly balance the engine and transmission on the vehicle chassis, engine mount is an important part of the vehicle to reduce the vibration and noise, by which smooth ride of the vehicle can be achieved. Vibration and strength of engine bracket has been continuously a concern which may lead to structural failure if the resulting vibration and stresses are severe and excessive. The present work focuses on the FEA analysis of engine mount bracket for three materials by using meshing and analysis software which are HYPERMESH and ABACUS, the materials used are cast iron, wrought iron and mild steel, modal analysis and static analysis carried out by which maximum von-misses stress and natural frequency are computed. The main objective is to select the best material from the obtained result under prescribed conditions.
Engine mounts have an important function of containing firmly the power-train components of a vehicle. Correct geometry and positioning of the mount brackets on the chassis ensure a good ride quality and performance. As an FSAE car intends to be a high performance vehicle, the brackets on the frame that support the engine undergo high static and dynamic stresses as well as huge amount of vibrations. Hence, dissipating the vibrational energy and keeping the stresses under a pre-determined level of safety have been achieved by careful designing and analysis of the mount brackets.
The Engine is one of the most important components of a road vehicle such as car. High performance sports car has their engine supported by bracket. It plays an important role in improving the comfort & work environment of a car. The improvement of engine bracket system has been the subject of intense interest for many years. It is necessary to design proper engine bracket for a car. As such, engine bracket has been designed as a framework to support engine. Fatigue of engine bracket has been continuously a concern which may lead to structural failure if the resulting stresses are severe and excessive. Prolonged exposure to whole-body stresses in the working environment may lead to fatigue and in some cases it damages the car. Objective of the project is to select the light weight material & reduce the weight of the bracket.
Engine mounts have an important function of containing firmly the power-train components of a vehicle. Correct geometry and positioning of the mount brackets on the chassis ensures a good ride quality and performance. As an FSAE car intends to be a high performance vehicle, the brackets on the frame that support the engine undergo high static and dynamic stresses as well as huge amount of vibrations. Hence, dissipating the vibrational energy and keeping the stresses under a predetermined level of safety should be achieved by careful designing and analysis of the mount brackets. Keeping this in mind the current paper discusses the modeling, Finite Element Analysis, Modal analysis and mass optimization of engine mount brackets for a FSAE car. As the brackets tend to undergo continuous vibrations and varying stresses, the fatigue strength and durability calculations also have been done to ensure engine safety.
Engine mounts have an important function of containing firmly the power-train components of a vehicle. Correct geometry and positioning of the mount brackets on the chassis ensures a good ride quality and performance. As an FSAE car intends to be a high performance vehicle, the brackets on the frame that support the engine undergo high static and dynamic stresses as well as huge amount of vibrations. Hence, dissipating the vibrational energy and keeping the stresses under a predetermined level of safety should be achieved by careful designing and analysis of the mount brackets. Keeping this in mind the current paper discusses the modeling, Finite Element Analysis, Modal analysis and mass optimization of engine mount brackets for a FSAE car. As the brackets tend to undergo continuous vibrations and varying stresses, the fatigue strength and durability calculations also have been done to ensure engine safety.
The ride and noise characteristics of a vehicle is significantly affected by vibration transferred to the body through the chassis mounting points from the engine and suspension. It is known that body attachment stiffness is an important factor of idle noise and road noise for NVH performance improvement. And high stiffness helps to improve the flexibility of bushing rate tuning. This paper presents the procedure of body attachment stiffness analysis, which contains the correlation between experimental test and FEA. It is concluded that the most important factors are panel thickness, section type and mounting area size. This procedure makes it possible to find out the weak points before proto car and to suggest proper design guideline in order to improve the stiffness of body structure.
The engine mounting plays an important role in reducing the noise, vibrations and harshness for improving vehicle ride comfort. The first and the foremost function of an engine mounting bracket is to properly balance (mount ) the power pack (engine and transmission) on the vehicle chassis for good motion control as well as good isolation. The present work deals with finite element method (FEA) analysis of an engine mounting bracket. It includes the modeling of the engine mounting brackets by changing the material of component. Materials selected are aluminum alloy and magnesium alloy. The analysis includes static and modal analysis of engine mounting bracket using circular cross section. The study shows that this bracket will have a dramatic weight reduction as compared to standard aluminum alloy material and withstand high stress.
The objective in this paper is to present some recent advances for the finite element analysis of automobile structures. These advances pertain to the development of effective basic finite element procedures and the efficient solution of large systems of equations. With these new procedures, it is possible to model much more accurately (and reliably) the actual nonlinear physical behavior of complex structures. The illustrative solutions given in the paper include the solution of a roof-crush problem that was solved appropriately, according to the actual physical situation, using implicit time integration (resulting practically in a static analysis).
An efficient procedure for minimizing the engine-induced harshness based on NVH analysis results of a full vehicle model was
developed in this study, taking stiffness and strength constraints into account. Although extensive research may be found
in the literature in the field of engine support system optimization, no other studies have considered the compliances and
resonances of the structure of the vehicle. In the present paper, NVH analysis results of the whole vehicle were used in an
optimization procedure to suppress the transmitted vibration. A procedure was developed to minimize the transmitted accelerations
to the mid-point of the driver’s seat rail. A DOE-based response surface methodology (RSM) was adopted to determine the optimal
solution. Natural frequencies of the body, suspension, and other subsystems were taken into consideration in determining the
optimal solution. NVH analysis was performed for two types of inputs: (a) vertical vibration due to vertical unbalanced forces
and (b) torsional vibration due to oscillations in the output torque of the engine.
Magnesium Power train Mount Brackets: New Application of Material
- Michael Champrenault
- Clayton A Maas
- Jack Cunningham
Michael Champrenault and Clayton A. Maas, Jack Cunningham,
"Magnesium Power train Mount Brackets: New Application of Material
Finite Element Analysis of Engine Mount Bracket
- P D Jadhav
- Ramakrishna
P.D.Jadhav, Ramakrishna " Finite Element Analysis of Engine Mount
Bracket" International journal of advancement in engineering
technology, management & applied science vol.1 (sept. 2014)