Reliability sensitivity numerical analysis of mechanical structure based on gamma processes

Author:

Zhang Yanshan1,Yang Zhengmao2

Affiliation:

1. School of Mathematics and Statistics, Beijing Institute of Technology, Beijing, China

2. School of Mechanical Engineering, Beijing Institute of Technology, Beijing, China

Abstract

Using random variables to describe uncertain parameters in structural systems, its initial strength and the evolution process of the strength degradation is regarded as the Gamma process. In this article, we propose a new method on reliability sensitivity numerical analysis of mechanical structure based on Gamma processes. Then, we use the fourth moment method based on frequency curve of Pearson to solve the problem of reliability calculation with random parameters of arbitrary distributions. Formulas for calculating the reliability sensitivity with respect to the mean and the variance of the random variables are derived. The reliability analysis of the welded box girders of crane is taken as an example to verify the proposed method. The results show that the method can effectively solve the problem of the reliability sensitivity of structural systems with strength degradation.

Publisher

SAGE Publications

Subject

Mechanical Engineering

Cited by 3 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Constrained Robust Model Reference Adaptive Control of a Tilt-Rotor Quadcopter Pulling an Unmodeled Cart;IEEE Transactions on Aerospace and Electronic Systems;2021-02

2. Probabilistic sensitivity analysis for the frame structure of missiles;Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science;2018-10-23

3. Reliability assessment of point-absorber wave energy converters;Ocean Engineering;2018-09

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