驾驶室ROPS性能非概率可靠性分析

The Non-probabilistic Reliability Analysis for the ROPS Performance of Cab

采用非线性有限元分析方法对安全驾驶室翻车保护装置(ROPS)进行强度计算并对其进行可靠性分析。利用超椭球凸模型理论量化材料的弹性模量、泊松比、密度的不确定性。针对极限状态函数复杂或为隐式函数的问题,采用薄板样条插值高维模型(TPS-HDMR)作为近似模型进行非概率可靠度分析,最后运用改进一次二阶矩算法(i HL-RF)求解非概率可靠度指标。结果表明:在材料参数的不确定范围内,该驾驶室可靠性满足设计要求。

The nonlinear finite element analysis method was utilized to analyze the strength of the Roll-over Protective Structure（ ROPS） of the safety cab and reliability analysis was also carried out in this paper.The super ellipsoid convex model theory was used to quantify the uncertain parameters of the material such as elastic modulus,poisson＇s ratio,and density.Due to the complicated or implicit limit state functions in the reliability problems,High Dimensional Model Representation based on Thin Plate Spline Interpolation（ TPS-HDMR） was employed to settle the problem.Finally,the i HL-RF method was used to calculate the non-probability parameter reliability.The results show that within the uncertainty scope of the material parameters,the reliability of the cab meets the design requirements.