Multibody dynamic analysis of a gear transmission system in electric vehicle using hybrid user-defined elements

2018 ◽  
Vol 233 (1) ◽  
pp. 30-42 ◽  
Author(s):  
Chao Liu ◽  
Zong-de Fang ◽  
Xuan Liu ◽  
Sheng-yang Hu
Keyword(s):  
Finite Element ◽  
Electric Vehicle ◽  
Rotational Speed ◽  
Impact Force ◽  
Transmission System ◽  
Gear Transmission ◽  
Input Shaft ◽  
Gear Transmission System ◽  
Mesh Models ◽  
Element Method

Considering flexibility of the support shafts as well as bearing supports, the effect of meshing impact force and meshing stiffness on the dynamic behavior of a gear transmission system in electric vehicle is investigated in this paper using the proposed hybrid user-defined element method. First, a structured grid generation method is introduced to establish accurate mesh models of the pinion and gear teeth. Second, coupling the tooth mesh models and the flexible shafts as well as bearings, two finite element models are, respectively, constructed for the two helical gear pairs of the electric vehicle reduction unit to calculate the meshing impact force. Next, the basic mechanism of meshing impact is explained in detail according to the finite element results, and the impact force is determined as one of the main internal excitations substituted into the dynamic model established by the hybrid user-defined element method. Under 50 N m input torque and 12,010 r/min rotational speed of the input shaft, the simulation results by the hybrid user-defined element method indicate that the example system reaches a steady state and the vibrations primarily occur at the meshing frequencies. With an increment of 600 r/min of the input rotational speed, it is also concluded from the results that (1) the calculated impact force approximately presents linear growth with the increase of the input shaft rotational speed and (2) the root mean square values of the vibration acceleration generally grow with the increase of the speed.

Vibration Analysis of Gear Transmission System in Electric Vehicle

2011 ◽  
Vol 199-200 ◽  
pp. 819-823
Author(s):  
Bi Hui Xie ◽  
Tong Zhang ◽  
Shu Guang Zuo
Keyword(s):  
Electric Vehicle ◽  
Helix Angle ◽  
Transmission System ◽  
Gear Transmission ◽  
Transmission Model ◽  
Systematic Research ◽  
Gear Transmission System ◽  
Total Analysis ◽  
Test Points ◽  
D Model

This paper presents a systematic research on the gear transmission system of the electric vehicle. An accurate 3-D model of the gear transmission system is established in UG (Unigraphics NX) using software Gearwizard, and then imported to ADAMS/View environment. Based on the contact force of ADAMS, the vibration at 3 different test points of the model are simulated. The simulation results seem to be in good accordance with the test results, which proved the validity of the gear transmission model. Finally, the influence of helix angle on vibration at 3 different test points are also researched. The results of the total analysis can be used further to optimize the gear transmission system of the electric vehicle.

scholarly journals Reliability analysis of gear transmission system of aeronautical turbine starter under multi-constraint

2020 ◽  
Vol 24 (3 Part A) ◽  
pp. 1513-1520
Author(s):  
Bing Zhang ◽  
Jian-Guo Gao ◽  
Gui-Long Min ◽  
Shoushuo Liu
Keyword(s):  
Finite Element ◽  
Reliability Analysis ◽  
Evaluation Method ◽  
Element Model ◽  
Transmission System ◽  
Gear Transmission ◽  
Analysis Method ◽  
Finite Element Software ◽  
Gear Transmission System ◽  
Low Efficiency

At present, there are some problems in the reliability analysis method for gear transmission system of aeronautical turbine starter, such as low accuracy of finite element model, low efficiency of analysis and low accuracy of analysis results. To this end, a reliability analysis method for the gear transmission system of aeronautical turbine starter under multi-constraint is presented. A 3-D model of the gear pair of aeronautical turbine starter is constructed in UG. The model is input into the finite element software for meshing. The gear transmission of aeronautical turbine starter under working conditions is simulated by defining boundary conditions and applying loads, which provides a basis for reliability analysis of gear transmission system of aeronautical turbine starter. The reliability of the gear transmission system of the aeronautical turbine starter is evaluated by the comprehensive evaluation method, and the reliability of the system is evaluated by the contact of the evaluation results. According to the evaluation results, the reliability analysis of the gear transmission system of the aeronautical turbine starter is realized under the condition of multi-constraint. The experimental results show that the proposed method has high analysis efficiency and high analysis accuracy.

Dynamic Performance of Gear Transmission System and Modification Optimization of Electric Vehicle Gearbox

2020 ◽  
Vol 103 (sp1) ◽  
pp. 366
Author(s):  
Qingyong Zhang ◽  
Yaru Wang ◽  
Weiping Lin ◽  
Xingjian Wu ◽  
Yongjun Luo
Keyword(s):  
Electric Vehicle ◽  
Dynamic Performance ◽  
Transmission System ◽  
Gear Transmission ◽  
Gear Transmission System

scholarly journals Dynamic characteristics analysis of planetary gear system with internal and external excitation under turbulent wind load

2021 ◽  
Vol 104 (3) ◽  
pp. 003685042110356
Author(s):  
Hexu Yang ◽  
Xiaopeng Li ◽  
Jinchi Xu ◽  
Zemin Yang ◽  
Renzhen Chen
Keyword(s):  
Wind Speed ◽  
Wind Turbine ◽  
Nonlinear Dynamic ◽  
Planetary Gear ◽  
Wind Load ◽  
Transmission System ◽  
Gear Transmission ◽  
Stiffness Ratio ◽  
Gear Transmission System ◽  
Planetary Gear System

According to the working characteristics of a 1.5 MW wind turbine planetary gear system under complex and random wind load, a two-parameter Weibull distribution model is used to describe the distribution of random wind speed, and the time-varying load caused by random wind speed is obtained. The nonlinear dynamic model of planetary gear transmission system is established by using the lumped parameter method, and the relative relations among various components are derived by using Lagrange method. Then, the relative relationship between the components is solved by Runge Kutta method. Considering the influence of random load and stiffness ratio on the planetary gear transmission system, the nonlinear dynamic response of cyclic load and random wind load on the transmission system is analyzed. The analysis results show that the variation of the stiffness ratio makes the planetary gear have abundant nonlinear dynamics behavior and the planetary gear can get rid of chaos and enter into stable periodic motion by changing the stiffness ratio properly on the premise of ensuring transmission efficiency. For the variable pitch wind turbine, the random change of external load increases the instability of the system.

Analysis on Vibration Response of Gear Transmission System

2011 ◽  
Vol 65 ◽  
pp. 177-181
Author(s):  
Jia Hong Zheng ◽  
Min Li
Keyword(s):  
Transmission System ◽  
Vibration Response ◽  
Gear Transmission ◽  
Wind Generators ◽  
Gear Transmission System ◽  
Internal Incentive ◽  
External Incentive

The inherent characteristics of the wind generators growth gearbox were solved, then the reasons which caused the gear transmission system generating dynamic incentive was analyzed, and also internal incentive and external incentive were given to 2MW wind generators gear transmission system quantitatively. On the basis of these, 2MW wind generators growth gearbox system’s vibration response caused under internal incentive and external incentive was solved and analyzed.

Analysis of Stochastic Nonlinear Dynamics in the Gear Transmission System with Backlash

2015 ◽  
Vol 16 (2) ◽  
pp. 111-121 ◽  
Author(s):  
Jingyue Wang ◽  
Haotian Wang ◽  
Lixin Guo
Keyword(s):  
Time Course ◽  
Damping Ratio ◽  
Excitation Frequency ◽  
Period Doubling ◽  
Spur Gear ◽  
Transmission System ◽  
Gear Transmission ◽  
Stochastic Dynamic ◽  
Random Disturbance ◽  
Gear Transmission System

AbstractIn order to study the different backlash, gear damping ratio and random disturbance on dynamic behavior of gear transmission system, stochastic dynamic equations of the three-degree-of-freedom spur gear transmission system are established considering random disturbances of a low-frequency external excitation induced by torque fluctuation, gear damping ratio, gear backlash, excitation frequency and meshing stiffness. Using bifurcation diagram, phase diagram, time course diagram, Poincaré map and power spectrum of the system, the dynamic characteristics of the gear transmission system with different backlash under gear damping ratio changing, and the influence of the random disturbance of gear damping ratio on the bifurcation characteristic of system are analyzed. Numerical simulation shows that the gear transmission system will be from periodic motion with a noisy disturbance to chaotic-like motion by period-doubling bifurcation with decreasing gear damping ratio. In the small damping ratio range, the backlash has great effect on the motion characteristics. Random disturbance has an important effect on the bifurcation characteristics.

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