Evaluation of vibration characteristics and running stability of railway vehicle by multi-body dynamics model with three-dimensional elastic carbody

2020 ◽  
Vol 2020 (0) ◽  
pp. 502
Author(s):  
Ryo FUNADA ◽  
Yuki AKIYAMA ◽  
Tadao TAKIGAMI ◽  
Yasunobu MAKITA
Keyword(s):  
Three Dimensional ◽  
Vibration Characteristics ◽  
Railway Vehicle ◽  
Dynamics Model ◽  
Body Dynamics ◽  
Multi Body

The Dynamics Simulation of Tracked Vehicles on the Hard and Soft Ground Based on the RecurDyn

2013 ◽  
Vol 842 ◽  
pp. 351-354 ◽  
Author(s):  
Chong Kai Zhou ◽  
Ya Yu Huang ◽  
Li Ni
Keyword(s):  
Three Dimensional ◽  
Simulation Software ◽  
Dynamics Simulation ◽  
Dynamics Model ◽  
Tracked Vehicle ◽  
Tracked Vehicles ◽  
Process Dynamics ◽  
Body Dynamics ◽  
Multi Body ◽  
Vehicle Movement

In order to accurately study a tracked vehicle movement on the ground in hard and soft features, this paper uses multi-body dynamics simulation software RecurDyn tracked vehicle subsystems Track (LM), establishing a three-dimensional multi-body vehicle dynamics model. For tracked vehicles at an inclination of 10 degrees slope, through the soft and hard ground steering process dynamics simulation and comparative analysis. This paper provides an accurate basis for the future in-depth research on Tracked vehicle.

Comparison of the Maxwell model and a simplified physical model for a railway yaw damper in damping characteristics and vehicle stability assessment

2021 ◽  
pp. 095440972110205
Author(s):  
Caihong Huang ◽  
Jing Zeng
Keyword(s):  
Physical Model ◽  
Vehicle Dynamics ◽  
Maxwell Model ◽  
Railway Vehicle ◽  
Vehicle Stability ◽  
Stability Assessment ◽  
Dynamics Model ◽  
Damping Characteristics ◽  
Body Dynamics ◽  
Multi Body

The Maxwell damper model has been adopted in the simulation of railway vehicle dynamics for a long time and became a basic force element in the multi-body dynamics software. The main purpose of this article is to investigate the predictive accuracy of this model for a railway yaw damper in damping characteristics and vehicle stability assessment. To achieve this objective, a simplified physical damper model was developed for comparisons, which is accurate and at the same time presents low computational costs, being able to be adopted in the multi-body dynamics model of a railway vehicle to speed up the numerical simulations. It was suitably validated in the damper rig test, and simulation results for those two damper models were compared with measured data. Results showed that the traditional Maxwell model of this typical yaw damper cannot accurately describe its dynamic behaviors, while the simplified physical model can accurately reproduce the complex behavior of the actual damper system with a high computational efficiency. Comparisons of vehicle dynamics relevant to vehicle stability were then carried out, by integrating the Maxwell model and the simplified physical model presented in this work into a multi-body dynamics model of a high-speed train in China. It was found that the Maxwell model can reproduce the phenomenon of carbody instability accurately if an appropriate value of the dynamic stiffness is set in the Maxwell model. In the simulation of bogie instability, the Maxwell model overestimates the dynamic damping of this typical yaw damper, and as a result it leads to large errors in stability calculations.

Dynamic model of an air spring and integration into a vehicle dynamics model

2008 ◽  
Vol 222 (10) ◽  
pp. 1813-1825 ◽  
Author(s):  
F Chang ◽  
Z-H Lu
Keyword(s):  
Dynamic Model ◽  
Vehicle Dynamics ◽  
Simulation Method ◽  
Heat Transfer Process ◽  
Spring Model ◽  
Dynamics Model ◽  
Air Spring ◽  
Full Vehicle ◽  
Body Dynamics ◽  
Multi Body

It is worthwhile to design a more accurate dynamic model for air springs, to investigate the dynamic behaviour of an air spring suspension, and to analyse and guide the design of vehicles with air spring suspensions. In this study, a dynamic model of air spring was established, considering the heat transfer process of the air springs. Two different types of air spring were tested, and the experimental results verified the effectiveness of the air spring model compared with the traditional model. The key factors affecting the computation accuracy were studied and checked by comparing the results of the experiments and simulations. The new dynamic model of the air spring was integrated into the full-vehicle multi-body dynamics model, in order to investigate the air suspension behaviour and vehicle dynamics characteristics. The co-simulation method using ADAMS and MATLAB/Simulink was applied to integration of the air spring model with the full-vehicle multi-body dynamics model.

A Study on the Influence of Sun Gear Misalignment on Planet Load Sharing and Lifetime of Planetary Gear Using MSC.ADAMS

2015 ◽  
Vol 743 ◽  
pp. 99-106 ◽  
Author(s):  
Kyung Min Kang ◽  
Peng Mou ◽  
D. Xiang ◽  
Gang Shen
Keyword(s):  
3D Model ◽  
Estimation Method ◽  
Planetary Gear ◽  
Load Sharing ◽  
Dynamics Simulation ◽  
Dynamics Model ◽  
Geometry Model ◽  
3D Geometry ◽  
Body Dynamics ◽  
Multi Body

Misalignment on sun gear in planetary gear is easily occurred and it usually causes serious problem of work efficiency and lifetime with the change of planet load sharing. For study on the influence of sun gear misalignment on load sharing, multibody dynamics simulation is employed in this paper. First of all, 3D geometry model of planetary gear is built by Solidworks. Based on 3D model, multi-body dynamics model of planetary gear is built by MSC.ADAMS and calculate meshing forces between sun gear and planet gears with each type of sun gear misalignment which are angular, radial and axial type. Based on this meshing force result, load sharing factor is calculated and the results of influence of each misalignment type to load sharing factor is obtained. Finally, gear lifetime is estimated by AGMA gear fatigue strength estimation method with load sharing factor. According to the results, radial misalignment is the most influence to load sharing factor and gear lifetime.

The Dynamics Analysis of a Multi-Stage Hybrid Planetary Gearing

2012 ◽  
Vol 538-541 ◽  
pp. 2631-2635
Author(s):  
Xin Tan ◽  
Yao Li ◽  
Jun Jie Yang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Gear Tooth ◽  
The Finite Element Method ◽  
Dynamics Model ◽  
Multi Stage ◽  
Body Dynamics ◽  
Multi Body ◽  
Rich Spectrum ◽  
Element Method

This paper introduces a complex multi-body dynamics model which is established to simulate the dynamic behaviors of a multi-stage hybrid planetary gearing based on the finite element method and the software ADAMS. The finite element method is used to introduce deformable ring-gears and sun-gears by using 3D brick units. A whole multi-body dynamics model is established in the software ADAMS. Mesh stiffness variation excitation and gear tooth contact loss are intrinsically considered. A rich spectrum of dynamic phenomena is shown in the multi-stage hybrid planetary gearing. The results show that the static strength of main parts of the gearing is strong enough and the main vibration and noises are excited by the dynamic mesh forces acting on the tooth of planet-gears and ring-gears.

The Analysis of Amphibious Vehicle Handling Stability Based on ADAMS/Car

2014 ◽  
Vol 1006-1007 ◽  
pp. 294-297 ◽  
Author(s):  
Zhi Ming Yan ◽  
Jian Jun Cai ◽  
Su Qin Qu ◽  
Fang Fang Zhai ◽  
An Rong Sun ◽  
...  
Keyword(s):  
Input Pulse ◽  
Suspension System ◽  
Dynamics Model ◽  
Vehicle Handling ◽  
Rear Suspension ◽  
Front Suspension ◽  
Stability Performance ◽  
Body Dynamics ◽  
Simulation Results ◽  
Multi Body

In this paper, a multi-body dynamics model of amphibious vehicle is established in terms of dynamic simulative software ADAMS/Car. The front and rear suspension system are studied and analyzed respectively. The handling stability performance of front suspension is simulated under step steering input, pulse steering input, steady turning, and meandered test in related to specifications. According to the simulation results, the handling stability of amphibious vehicle is evaluated objectively.

The Study of Elastic Dynamic of the Deployment Mechanism in Large Deployable Reflector

2013 ◽  
Vol 390 ◽  
pp. 246-250
Author(s):  
San Min Wang ◽  
Su Chen ◽  
Ru Yuan
Keyword(s):  
Elastic Deformation ◽  
Dynamic Properties ◽  
Rigid Body Dynamics ◽  
Dynamics Model ◽  
Satellite Antenna ◽  
Body Dynamics ◽  
Multi Body ◽  
Development Structure ◽  
Deployable Reflector ◽  
Method Analysis

The study regards the ETS-VIII satellite antenna unit deployment mechanism as object, uses multi-body dynamics theory as basement to build the rigid body dynamics model of the unit bodies, adopts the finite element method analysis of bending of elastic deformation of the linkage, to establish a unit elasticity of dynamics model and to research the components of flexible dynamic properties of the cell bodies of satellite antenna development. The result of the research shows that the flexibility of the component will lead to the elastic deformation of the cell bodies, in which beats significantly in the location of the maximum abduction, takes place in the deployment process. The research lies the foundation for the dynamic optimization of design of development structure.

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