scholarly journals Research on Coupled Dynamic Model of Tracked Vehicles and Its Solving Method

2015 ◽  
Vol 2015 ◽  
pp. 1-10
Author(s):  
Yuliang Li ◽  
Chong Tang
Keyword(s):  
Dynamic Performance ◽  
Tractive Force ◽  
Actual Structure ◽  
Discrete Method ◽  
Tracked Vehicles ◽  
Coupled Equations ◽  
Calculation Results ◽  
Dynamic Software ◽  
Multi Body ◽  
Body Dynamic

In order to conveniently analyze the dynamic performance of tracked vehicles, mathematic models are established based on the actual structure of vehicles and terrain mechanics when they are moving on the soft random terrain. A discrete method is adopted to solve the coupled equations to calculate the acceleration of the vehicle’s mass center and tractive force of driving sprocket. Computation results output by the model presented in this paper are compared with results given by the model, which has the same parameters, built in the multi-body dynamic software. It shows that the steady state calculation results are basically consistent, while the model presented in this paper is more convenient to be used in the optimization of structure parameters of tracked vehicles.

Dynamic Performance Analysis of Locomotives Based on the Matching between Worn Wheel-Rail Profiles

2013 ◽  
Vol 748 ◽  
pp. 386-389
Author(s):  
Da Kui Wang ◽  
Jun Zhang ◽  
Xiu Juan Zhang ◽  
You Yi Sheng
Keyword(s):  
Dynamic Performance ◽  
Type I ◽  
Dynamic Performances ◽  
Wheel Profile ◽  
Dynamic Software ◽  
Pass Through ◽  
Set Up ◽  
Multi Body ◽  
Dynamic Performance Analysis ◽  
Body Dynamic

Wheel profiles in different abrasion stages are tracked and measured for locomotives SS4. They are then matched with rail profiles in the measured wear stability period. In order to contrast the wheel profiles in different abrasion stages, multi-body dynamic software named SIMPACK is adapted to set up a complete dynamics model of locomotives. The influence of wheel profiles in different abrasion stages on the dynamic performances of locomotives is simulated and analyzed. Analysis results state that locomotives using the wheel profiles of typeII have the good stability for their line operation. Locomotives using the wheel profiles of type I have the highest critical hunting speed of 223km/h, which is 54.8% larger than those of wheel profile JM3. When locomotives pass through curve tracks, the value of derailment factor for the wheel profiles of typeII is the smallest and achieves an excellent level, which explains that the wheel profiles of typeII can obtain the good curve negotiation performance.

Research on Running Stability of the Rail Vehicle Based on SIMPACK

2013 ◽  
Vol 328 ◽  
pp. 589-593
Author(s):  
Li Hua Wang ◽  
An Ning Huang ◽  
Guang Wei Liu
Keyword(s):  
Dynamic Model ◽  
Optimization Design ◽  
Dynamic Performance ◽  
Running Speed ◽  
Design And Optimization ◽  
Rail Vehicle ◽  
Body Dynamics ◽  
Multi Body ◽  
Body Dynamic ◽  
Track Irregularities

There are higher requirements on running stability of the rail vehicle with the incensement of the running speed. The running stability is one of the important indicators of evaluating the dynamic performance of the rail vehicle. In this paper, the whole multi-body dynamic model of the rail vehicle was proposed based on the theory of multi-body dynamics in the software of Simpack. And the lateral and vertical vibrate accelerations of the rail vehicle were simulated when it was inspired by the track irregularities. Then the running stabilities of the rail vehicle were estimated accurately. This will propose basis on the improving design and optimization design of the whole rail vehicle.

Failure Effects of Anti-Hunting Damper on High-Speed Train

2013 ◽  
Vol 694-697 ◽  
pp. 90-94 ◽  
Author(s):  
Ji Min Zhang ◽  
Li Wen Man
Keyword(s):  
Dynamic Model ◽  
High Speed ◽  
Critical Speed ◽  
Dynamic Performance ◽  
High Speed Train ◽  
Multi Body ◽  
Body Dynamic

The multi-body dynamic model of the high-speed train is established in order to study the failure effects of anti-hunting damper. Four kinds of failure case of the anti-hunting damper are compared, specifically including: one anti-hunting damper of the front bogie is broken; two anti-hunting dampers of the front bogie are broken; three anti-hunting dampers of the front bogie are broken; all four anti-hunting dampers of the front bogie are broken. The results have shown: when only one anti-hunting damper is broken, the influence to the dynamic performance of the high speed train is small, but once two anti-hunting dampers or more out of work, the critical speed of the vehicle decreases much more and the curve-passing performance also become worse.

Balance and Vibration Analysis on an in-Line Five Cylinders Engine

2013 ◽  
Vol 694-697 ◽  
pp. 297-301
Author(s):  
Shi Yu Li ◽  
Zhao Cheng Yuan ◽  
Jia Yi Ma ◽  
Meng Liu ◽  
Ying Xiao Yu
Keyword(s):  
Vibration Analysis ◽  
Balance System ◽  
Dynamic Software ◽  
Multi Body ◽  
Balance Property ◽  
Body Dynamic

Based on an existing in-line six cylinders engine, this paper built a model of in-line five cylinders engine, and analyzed this engine’s balance property in theory. In order to improve the balance of this in-line five cylinders engine, a kind of double-shaft balance system was used, and it turned out to be effective by simulating with multi-body dynamic software-AVL Excite.

scholarly journals Displacement Reliability Analysis of Submerged Multi-body Structure’s Floating Body for Connection Gaps

Open Physics ◽  
2019 ◽  
Vol 17 (1) ◽  
pp. 281-290
Author(s):  
Kongde He ◽  
Fadzi Ali ◽  
Borihan Md
Keyword(s):  
Flow Field ◽  
Dynamic Performance ◽  
Floating Body ◽  
Average Value ◽  
Damping Characteristics ◽  
Calculation Results ◽  
Multi Body ◽  
The Impact ◽  
Dynamic Elongation ◽  
Peak Value

AbstractAiming at the problem of systems’ dynamic characteristics’ randomness caused by connection gaps of submerged multi-body structures, a stochastic and uncertainty dynamical model were formulated for connection gaps and dynamic elongation of mooring cables. This model considered sag effect caused by light, soft and low damping characteristics of mooring cables and their dynamic elongation under the impact of flow field and connection gaps. The equivalent elastic modulus method was used to modify the sag effect. The Newmark-β method was used to solve the problem. Calculation results showed that the average value and peak value of floating body displacement caused by uncertainty of gap contact states are larger than those of ideal articulated states. The reliability of floating body’s displacement with gap contact will be reduced to different extents and the reliability of displacement in velocity direction changes greatly, especially perpendicular to flow field. When studying multi-body structures, randomness of contact state should be considered to reduce the dispersion of clearance and improve dynamic performance.

Analysis of Static Stability of Articulated Hydraulic Excavator with Two Degree of Freedom

2012 ◽  
Vol 430-432 ◽  
pp. 1663-1666
Author(s):  
De Xin Sun ◽  
Xin Hui Liu
Keyword(s):  
Working Conditions ◽  
Geometric Model ◽  
Static Stability ◽  
Degree Of Freedom ◽  
Hydraulic Excavator ◽  
Lateral Stability ◽  
Dynamic Software ◽  
Multi Body ◽  
Two Degree Of Freedom ◽  
Body Dynamic

In this paper, the geometric model of the hydraulic excavator with two degree of freedom was built, and then the dynamic model based on the multi-body dynamic software RecurDyn was built, and then the lateral stability and longitudinal stability of the hydraulic excavator on different gradients were analyzed, the result showed the tipping feather of the hydraulic excavator truly, and this paper provides guidance for choosing the hydraulic excavator’s working conditions.

Design and Simulation of Automotive Seat Height Adjuster Driving Mechanism Based on Multi-Body Dynamics

2014 ◽  
Vol 592-594 ◽  
pp. 2282-2286 ◽  
Author(s):  
Rahul Dilip Nandurkar ◽  
Akash Mohanty ◽  
P. Barath
Keyword(s):  
Factor Of Safety ◽  
Analytical Calculation ◽  
Design Tool ◽  
Driving Mechanism ◽  
Simulation Tool ◽  
Seat Height ◽  
Body Dynamics ◽  
Dynamic Software ◽  
Multi Body ◽  
Body Dynamic

The paper presents a technique to simulate driving mechanism in automotive seat height adjuster. Simulation is done using multi-body dynamic software ADAMS. The exercise included development of an accurate model using design tool. The design model is then converted to simulation tool. Selected operating force is applied and simulated. The area of focus is forces between two gear meshing parts. Simulation result is then compared with analytical calculation. Validation is also made for the considered factor of safety.

Dynamic Research with Drivetrain Simulation and Modal Analysis of Wind Turbine Gearbox

2014 ◽  
Vol 952 ◽  
pp. 161-164 ◽  
Author(s):  
Zheng Li ◽  
Yang Chen
Keyword(s):  
Wind Turbine ◽  
Modal Analysis ◽  
Dynamic Theory ◽  
Dynamic Performance ◽  
Modal Parameters ◽  
Analysis Software ◽  
Wind Turbine Gearbox ◽  
System Vibration ◽  
Multi Body ◽  
Body Dynamic

The dynamic performance of wind turbine gearbox is very important for measuring the integrated vibration and noise of the whole drivetrain system of wind turbine. The stiffiness and modal parameters of the gearbox will influence the system vibration situation obviously. The wind turbine gearbox is a kind of complicated coupled mechanics; it means the modal analysis on gearbox should consider the coupling effects of the components and define logical damping factors. This paper presents a method to simulate wind turbine gearbox system with the multi-body drivetrain dynamic analysis software. The modal analysis of wind turbine gearbox can be carried out on the basis of the multi-body dynamic theory.

Analysis on Curve Negotiation Ability of the Rail Vehicle Based on SIMPACK

2013 ◽  
Vol 721 ◽  
pp. 551-555 ◽  
Author(s):  
Li Hua Wang ◽  
An Ning Huang ◽  
Guang Wei Liu
Keyword(s):  
Dynamic Performance ◽  
Lateral Force ◽  
Lateral Stability ◽  
Rail Vehicle ◽  
Body Dynamics ◽  
Curve Track ◽  
The Stability ◽  
Multi Body ◽  
Body Dynamic ◽  
Curve Negotiation

The curve negotiation ability and lateral stability are the important and contradictory indicators when evaluating the dynamic performance of the rail vehicle. And in order to study the stability of the rail vehicle, its curve negotiation ability will be studied firstly. In this paper, the whole multi-body dynamic model of the rail vehicle was proposed based on the theory of multi-body dynamics in the software of Simpack. And the lateral force, derailment and overturning coefficient of the rail vehicle when it passed through a specific curve track with specific speed. Then the curve negotiation ability of the rail vehicle was estimated accurately.

Flexible Dynamic Analysis of Hydraulic Excavator’s Boom

2011 ◽  
Vol 328-330 ◽  
pp. 2220-2223
Author(s):  
De Xin Sun ◽  
Xin Hui Liu
Keyword(s):  
Dynamic Response ◽  
Structure Design ◽  
Force Analysis ◽  
Response Characteristics ◽  
Road Condition ◽  
Dynamic Software ◽  
Set Up ◽  
Multi Body ◽  
Working Device ◽  
Body Dynamic

To study the dynamic response of hydraulic excavator’s boom under different road condition, this paper set up numerical model of excavator’s working device, then set up the virtual prototyping simulation model of excavator’s working device and simulated the flexible dynamic response characteristics of the boom based on multi-body dynamic software, RecurDyn. The results showed that, modeling and simulating method based on rigid multi-body coupling flexible multi-body dynamic modeling and analyzing technologies, reproduced the actual working conditions truly. The dynamic stress’s rule of variation provides an important method for the structure design and force analysis of hydraulic excavator’s working device.

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