【摘要】 提出了综合考虑动载荷和结构参数双重随机性的动力可靠度分析方法。首先基于随机振动的首次超越破坏准则,参照随机变量功能函数模式,建立了随机结构动力可靠度功能函数;然后引入序列响应面法,对功能函数进行拟合;最后用JC法求解可靠指标。算例分析验证了本文方法具有较好的计算精度和计算效率,尤其在复杂工程结构的动力可靠度分析中有广阔的应用前景。更多还原

【Abstract】 The method for dynamic reliability analysis, in which the randomicity of dynamic loads and structural parameters can be considered,is proposed. Firstly, based on First Excursion Failure Criterion of random vibration and the performance function of random variables, the performance function of dynamic reliability is established. Then, Sequential Surface Response Method is used to fit the performance function. Finally, the reliability index is obtained through JC method. An example shows the method has high accuracy and efficiency. It has wide prospect of application especially in dynamic reliability analysis of complex engineering structures.更多还原