【摘要】 本文以提高复杂结构可靠性分析精度为主要目的，通过拟纯概率思想建立的三参数可靠性模型，对拟纯概率有限元方法的基本理论及计算进行了研究。文中以材料性能参数、几何参数和外载荷等为随机变量，导出了三维概率有限元法基本计算表达式。应用本文方法计算了纯弯曲下标准缺口试件的可靠度，并与实验结果和常规的二参数可靠性分析计算结果进行了对比。结果表明，本文提出的方法具有更高的计算精度。更多还原

【Abstract】 In order to increase the reliahlity accuracy of complex structures,the basic theory and calculation procedure of quasi-pure probabilistic finite element method(QPFEM)are present-ed in this paper on the basis of third moment reliability analytical model.The evaluation for-mulas of three dimensional QPFEM are derived in the case that the randomness occurs eitherin the load,material properties,geometric shape,or a combination of the these. The reliabilityof pure bending standard notched specimen is calculated by the present method and comparedwith one obtained by experiment and normal PFEM,The result shows that the QPFEM hashigher calculation accuracy.更多还原