Reliability Analysis for the Gear of Power Assisting Cycle with Multi-Extremum Response Surface Method

4th International Conference on Mechanics and Mechatronics Research

机械制造;无线电电子学

Zhang, Chun-Yi^1 ; Wang, Ai-Hua^1 ; Sun, Tian^1 ; Jing, Hui-Zhe^1 ; Li, Cheng-Wei^1

School of Mechanical and Power Engineering, Harbin University of Science and Technology, Harbin

150080, China^1

关键词: Center gears;    Comprehensive reliability;    Dynamic reliability;    Material density;    Output response;    Response surface;    Response surface method;    Stress and strain;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/224/1/012017/pdf
DOI  :  10.1088/1757-899X/224/1/012017

来源: IOP

【 摘 要 】

To more accurately calculate the dynamic reliability for the center gear of power assisting cycle with various failure modes, the multi-extremum response surface method is adopted. The first, the gear's torque, material density, elastic modulus and poisson's ratio are sampled in small batches as the random input samples, the dynamic extremum of deformation, stress and strain are obtained as output response by finite element model. Then, the multi-extremum response surface equation is established. Finally, multitudinous sample points are obtained by using Monte Carlo method and linkage sampling to multi-extremum response surface equation, which can used to calculate the reliability of the deformation, stress and strain of the gear in the comprehensive failure mode. The results show that the comprehensive reliability degree of gear is 0.9949 when the allowable deformation, stress and strain are 0.47 mm, 540 Mpa and 0.003, respectively.