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| Reliability sensitivity analysis of two column ROPS of loader |
| QIN Dai-Cheng, MA Tian-Zheng, ZHANG Yi-Min, LU Hao |
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Abstract The main function of roll\|over protection is to protect the drivers safety and minimize loss of property caused by the accident, when the construction vehicle rolls over or other accidents occur. The article analyzed the reliability and reliability sensitivity of the two\|column roll\|over protection device. The FEM software was used to estabilish the parametric model and the corresponding design variables. According to the experimental design theory, the relationship between the design variables and the stress were obtained through the random FEM method. In order to get the explicit expression of the performance function, we used the BP(back propagation) neural network to make the nonlinear fitting. According to stress\|strength interference theory, first\|order second\|moment method was employed to compute the reliability. Using matrix differential technology, we analyzed the influence of design variables on the reliability of the structure, and thats the reliability of the sensitivity. The results provide a theoretical basis for the design of roll\|over protection device. To a certain extent, it has significant meaning for engineering．
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Published: 28 October 2011
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装载机两柱翻车保护装置的可靠性灵敏度分析
翻车保护装置的主要功能是当工程车辆发生滚翻等意外事故时,保障驾驶员的安全,最大限度地降低事故造成的生命财产损失.对装载机两柱翻车保护装置的可靠性及可靠性灵敏度进行分析.使用有限元软件对结构进行参数化建模,建立相应的设计变量.根据试验设计理论,使用随机有限元方法对结构进行应力分析,获得了设计变量与应力间的一一对应关系.利用BP神经网络的非线性拟合技术,对获得的样本进行拟合,获得功能函数的显式表达.根据应力-强度干涉理论,运用一次二阶矩方法得到结构的可靠性.使用矩阵微分技术,分析了设计变量对结构可靠性的影响程度,即可靠性灵敏度.所得结果可为装载机两柱翻车保护装置的设计提供理论依据,具有一定的工程意义.
关键词：
翻车保护装置,
可靠性灵敏度,
BP神经网络,
一次二阶矩法
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