薄壁杆件约束扭转强度可靠度计算的有限元法

A Finite Element Method for the Restrained Torsion Reliability Computation of the Thin-Walled Beam

根据变截面薄壁杆件约束扭转的特点,提出用一维随机有限元法来计算其扭转强度的可靠度.它能够计算翘曲约束引起的二次剪应力流,具有计算工作量小、精度高的优点.

According to the characteristic of the restrained torsion of the thinwalled beam with varied crosssections, a stochastic finite element method for its torsional strength reliability computation is developed in this paper.This method takes into account the effect of secondary shear flow resulting from warping restraint.It has the advantages of little computation and high accuracy.