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Publications (14)
The computer simulation of railway wheelset (WS) dynamics taking into account elasticity allows analyzing WSs high frequency oscillations and vibroaccelerations of parts connected with them, modeling wheelsets strain, estimating the WS deformation impact upon force distributions in gears of locomotive drives, and also solving other problems. In the...
Based on the large general multi-body dynamics simulation and analysis platform Universal Mechanism( UM) ,a professional computer program UM Maglev is developed for the coupling vibration simulation of maglev train-track beam. The maglev train is set as multi-rigid-body model,the stiffness and damping of springs and dampers are regarded as linear o...
Two simulation techniques for analyzing flexible wheelset dynamics are presented. They are applied within multibody approach and implemented in "Universal mechanism" software. Equations of wheelset motion are derived using floating frame of reference and component mode synthesis methods. Modal analysis is carried out in external FEA software. Kinem...
Two simulation techniques for simulation of flexible wheelset dynamics are presented.
The aim of the paper is to present the approach for simulation of dynamics of the systems consisting of railway vehicle, flexible track and flexible foundation. Railway vehicles are considered as multibody systems that include rigid or flexible bodies, joints and force elements. The track model is considered as a periodic 3D structure consisting of...
Two approaches for simulation of dynamics of complex beam structures such as drill strings are considered.
In the first approach, the drill string is presented as a set of uniform beams connected via force elements. The beams can undergo arbitrary large displacements as absolutely rigid bodies but its flexible displacements due to elastic deformati...
The paper focuses on application of multibody system approach for the torque and drag analysis of long drill strings. The approach is used to get improved results as compared with those obtained by soft-string models. The analysis is carried out by integration of equations of motion of the drill strings till reaching equilibrium under externally ap...
Many engineering dynamic problems can be simulated as beam structures. For example, such models are applied in well drilling. Dynamic simulation allows optimizing shape of well bore and operations parameters of the drilling. Calculation speed of simulation of dynamics of a drill string depends on size of matrices of a model and on effectiveness of...
The selection of optimal operational parameters for drilling oil and gas wells is a complex dynamic problem that depends on multiple parameters. Numerous physical and mechanical processes such as rock cutting, friction, hydraulics, and different modes of vibrations, occur during drilling, which should be accounted for in numerical models. It is wid...
The present paper describes the CAE-based approach for analysis of dynamics of a coupled model of flexible railway bridge and train [3, 5, 6]. The approach is being implemented in Universal Mechanism (UM) software. The railway bridge is considered as a flexible multibody system. Dynamics of flexible bodies is simulated using data imported from fini...
The program which is intended for the simulation of train derailment processes and the identification of causes of derailments is considered in this paper. Train derailments can be caused by many reasons. In some derailment cases, the causes of derailments are obvious, for example railway vehicle or track faults, obstacles on the tracks and so on....
Computer models of freight cars with three-piece and Y25 bogies are considered and compared. Efficient numeric methods for
simulation of vehicle models in the presence of frictional contacts are discussed. Some simulation results on derailment safety
analysis and influence of track gauge value on freight-car dynamics are presented. Methods of stres...
The present paper describes the CAE-based approach for durability analysis that is being implemented in Universal Mechanism software to predict the fatigue damage of parts of mechanical systems. The approach predicts fatigue strength of structural components of machines and mechanisms based on results of simulating their dynamics taking into accoun...
The present paper describes the CAE-based approach for analysis of dynamics and stress state of parts of mechanical systems. The approach is being implemented in Universal Mechanism (UM) software. Object of researches is considered as rigid-flexible multibody system. Dynamics of flexible bodies is simulated using data imported from finite element a...