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针对目前现有可靠度计算方法存在的缺点,基于可靠度指标的几何涵义,运用模拟退火算法原理,建立可靠指标的优化模型,提出一种计算桥梁结构可靠度指标的全局优化算法。该方法利用模拟退火思想与原理,能有效克服传统算法容易陷入局部最优解而无法自拔的弊端,而且对于复杂性和非线性的功能函数,避免了繁琐的求偏导数工作,是一种求解复杂桥梁结构可靠度问题的有效方法,并通过实例来证明了该方法的有效性。
Aiming at the shortcomings of current reliability calculation methods, based on the geometric meaning of reliability index, the optimization model of reliable index is established by using the principle of simulated annealing algorithm. A global optimization algorithm for calculating the reliability index of bridge structure is proposed. The method uses simulated annealing idea and principle, which can effectively overcome the shortcomings that the traditional algorithm is easy to fall into the local optimal solution and can not extricate itself from the complicated function and the nonlinear function function, and avoids the cumbersome work of partial derivative derivation An effective method to solve the reliability problem of complicated bridge structures is given and the effectiveness of the method is proved by examples.