| 吴狄,关鼎.一种结构可靠性指标的搜索方法[J].计算力学学报,2005,22(6):788~791 |
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| 一种结构可靠性指标的搜索方法 |
| A search algorithm for structural reliability index |
| 修订日期：2003-11-21 |
| DOI：10.7511/jslx20056153 |
| 中文关键词: 结构 可靠性指标 搜索方法 自动变步长搜索方法 |
| 英文关键词:structure,reliability index,search algorithm |
| 基金项目: |
| 吴狄 关鼎 |
| [1]沈阳工程学院机械工程系．辽宁沈阳110136 [2]沈阳工业大学,辽宁沈阳110023 |
| 摘要点击次数: 1084 |
| 全文下载次数: 14 |
| 中文摘要: |
| 提出了一种计算结构可靠性指标的搜索方法，即自动变步长搜索方法。该方法克服一次二阶矩方法的缺点，对于非线性功能函数非常有效。数值例题表明：这种方法具有很好的收敛性和较高的计算精度，且其收敛性与初始步长无关，可以用于复杂问题可靠度的分析。 |
| 英文摘要: |
| This paper presented a search algorithm proposed for calculating the structural reliability index,which changes step automatically. The algorithm overcomes the fault existing in the first-order second-moment method.That is to say,even when the nonlinearity of performance function is comparatively high,the convergence can still be guaranteed.So the algorithm can change step automatically,so that it overcoumes some faults existing in other algorithms.For instance,convergence is decided by the selection of step can only depend on experimental calculation.The numerical results demonstrate that the algorithm has characteristics of better convergence and relatively high accuracy,and it can be used in analysis on reliability of complex problems. |
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