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地震作用下结构动力可靠度时域显式子集模拟方法

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摘要 时域显式表达式将随机样本变量成功分离出来,使结构动力响应的求解变得更为简洁,从而有效提高了用蒙特卡罗法计算结构动力可靠度的效率。而传统子集模拟法求解可靠度所需的样本数比传统蒙特卡罗法少,因此本文在时域显式表达式基础上引入子集抽样方法,基于Metropolis-Hastings法则可以获得所需条件样本,利用概率论乘法原理可以获得最终失效概率,从而减少了可靠度计算所需的样本总数,进一步提高了计算效率。计算结果表明改进的方法在保证较高计算精度的基础上,计算时间成量级减小,在小失效概率情况和大型复杂结构情况下,改进方法的优势更加明显。
作者 张加兴
出处 《铁道勘测与设计》 2014年第1期51-58,共8页 Railway Survey and Design
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参考文献14

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