Fatigue Reliability Evaluation Method of a Gear Transmission System Under Variable Amplitude Loading

2019 ◽  
Vol 68 (2) ◽  
pp. 599-608 ◽  
Author(s):  
Xiufeng Tan ◽  
Liyang Xie
Keyword(s):  
Evaluation Method ◽  
Reliability Evaluation ◽  
Transmission System ◽  
Gear Transmission ◽  
Fatigue Reliability ◽  
Variable Amplitude Loading ◽  
Variable Amplitude ◽  
Gear Transmission System

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.

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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