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构建了物理参数、几何参数和载荷同时具有不确定性的桁架结构有限元分析模型,提出了基于可信度约束的区间因子法的结构分析方法;定义了具有可信度约束的区间运算规则;利用区间因子的数学表述,推导出结构位移响应和单元应力响应的计算表达式.算例给出了区间参数结构的响应可能区间及其可信度的计算结果,表明该方法的可行性和有效性.
The finite element analysis model of truss structure with physical parameters, geometric parameters and loads is established. The structural analysis method of interval factor method based on credibility constraint is proposed. The interval operation rules with the reliability constraint are defined. The mathematical expression of interval factor is used to deduce the computational expression of displacement response and element stress response.The calculation results of the interval and its credibility of the interval parameter structure are given in the example.The result shows that the method is feasible and effective Sex.