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可靠性灵敏度分析在可靠性设计和修改、可靠性优化设计、可靠性维护等方面均有重要的应用。但由于最大可能点摄动法、JC法、几何法等方法进行结构可靠度的计算时无法将可靠性指标函数表示为随机变量的显式,给可靠性灵敏度分析带来困难,该文基于响应面法将可靠性指标函数表示为随机变量的显式,从而较好地解决问题。通过实例计算,说明文中方法在工程实际中的应用。实例结果表明响应面法在获得在某区域内的可靠度及该区域内的可靠性灵敏度时是一种实用、快速、有效的方法。
Reliability Sensitivity analysis has important applications in reliability design and modification, reliability optimization design, and reliability maintenance. However, due to the maximum possible point perturbation method, JC method, geometric method and other methods for the calculation of structural reliability, the reliability index function can not be expressed as an explicit random variable, which makes the reliability sensitivity analysis difficult. Based on the response The surface method expresses the reliability index function as the explicit expression of random variables so as to solve the problem well. By example calculation, explain the application of the method in engineering practice. The results show that the response surface method is a practical, rapid and effective method to obtain the reliability in a certain area and the reliability sensitivity in this area.