摘要
在载荷随机的情况下 ,把铁路救援起重机基本臂模型离散为 390个板壳单元 ,然后利用摄动随机有限元计算最大应力单元主应力的均值和方差。在强度为确定性变量的情况下 ,把结构从安全状态到失效状态的过滤性考虑成一模糊事件 ,采用半梯形偏小隶属函数 ,计算QTJS16 0铁路起重机伸缩式吊臂的模糊可靠度。
The basic jib model under stochastic loads is built which consists of 390 plate elements and the mean value and deviation of the first principal stress in the maximum stress element are calculated with perturbation stochastic finite element method.Considering that the material strength is a constant and that transition from safe state to failure state is a fuzzy matter,which is expressed by half-trapezoidal ambiguity function,the fuzzy reliability of telescopic jib of the QTJS160 railway crane is worked out.
出处
《起重运输机械》
北大核心
2003年第9期12-15,共4页
Hoisting and Conveying Machinery
关键词
铁路起重机
伸缩臂
摄动随机有限元
模糊可靠度
可靠性
railway crane
telescopic jib
perturbation stochastic finite element
fuzzy reliability
