摘要
基于大型通用有限元软件ANSYS概率设计系统,提出利用ANSYS概率分析功能对桥墩在冲击荷载作用下最大应力进行可靠性分析的方法。采用ANSYS的中心复合设计法,对桥墩在冲击荷载、荷载位置、弹性模量以及密度等随机变量作用下的结构可靠度进行计算,获得桥墩应力响应的可靠度指标和桥墩的失效概率,以及最大应力与各个随机变量的相关灵敏度等一系列具有重要价值的结论。
On the basis of large universal finite element software-ANSYS probability design system,this paper proposes the methods of analysis for reliability of bridge piers at the maximum stress under the effect of impact load by means of the ANSYS probability analysis function.This paper calculates structural reliability of bridge piers under the effect of random variables including impact load,load position,elastic modulus and density,etc.by means of the central composite design of ANSYS to obtain series conclusions of important values such as reliability index of response to stress and failure probability of bridge piers as well as relative sensitivity of the max.stress to various random variables.
出处
《公路交通技术》
2013年第3期54-57,共4页
Technology of Highway and Transport
关键词
概率有限元
冲击荷载
可靠度
失效概率
相关灵敏度
probabilistic finite element
compact load
reliability
failure probability
relative sensitivity
