波纹腹板H形钢吊车梁疲劳寿命有限元分析

利用Matlab程序模拟吊车梁变幅应力荷载谱并采用考虑低应力幅值影响的疲劳曲线,应用有限元分析方法,将波纹腹板H形钢吊车梁与具有相同承载力极限和荷载边界条件的普通平截面H形钢吊车梁的疲劳寿命进行比较.结果表明,波纹腹板H形钢吊车梁相对于普通平截面H形钢吊车梁的整体疲劳性能和疲劳寿命均得到了较大的提升.此外,通过改变腹板...

Finite Element Analysis on Fatigue Life of a Corrugated Web H-shaped Steel Crane Beam

This paper simulated crane beam load spectrum using Matlab,and adopted variable amplitude stress considering the effects of low stress amplitude fatigue curve.Finite element method was conducted to compare the fatigue life between corrugated-web H-shaped crane beam and normal H-shaped crane beam with the same bearing capacity and limit load boundary conditions.The whole corrugated web H-shaped crane beam fatigue performance and fatigue life got a lot of improvement.In addition,this paper analyzed the fatigue life of the structure by changing the corrugated size of web members,including height,length and inclination angle of the corrugated web,and systematically studied the fatigue life of the crane beam of H-shaped with corrugated webs.Finally,combining with the steel consumption of corrugated webs in different sizes and considering the fatigue and economic performance at the same time,some rules were obtained as a reference for future corrugated web design.