Open AccessResearch on design method of time-varying uncertainty of bolted connections
Author(s) -
Yongsheng Zhao,
Huirong Fu,
Lixia Wang,
Hongchao Wu,
Shunlei Li
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/612/3/032077
Subject(s) - reliability (semiconductor) , bolted joint , matlab , structural engineering , bolting , set (abstract data type) , connection (principal bundle) , random variable , joint (building) , engineering , reliability engineering , computer science , mathematics , finite element method , statistics , power (physics) , physics , quantum mechanics , programming language , operating system
For the change of uncertainty caused by the influence of time on the bolt connection during use, this paper is based on a time-varying uncertainty design method for several parameters that change with time. The method consists of stochastic differential equations. The bolt-on time-varying design combines mathematical models of the distribution parameters of multivariate random variables. The design method of bolting connection with uncertainties of various influencing factors with time is proposed, and the time-varying design of tightly connected bolts subjected to axial working load is taken as an example. The method considers the dynamic changes of the stress and the allowable stress of the bolted joint, so that the safety of the bolted product is more accurately evaluated for dynamic reliability. Through this method, combined with the set initial values of the parameters and the historical data obtained by the test, the reliability of a certain time can be calculated. The design of the example uses Matlab to simulate the data, and the reliability of the specified time is obtained, which is the test of the bolting result. And assessment provides an important reference.