随机剪切柱在地震激励下的演变随机响应

随机剪切柱是指固连于地面的剪切柱的某些物理参数是随机变量 ,该模型在Niigata地震激励下的响应属于演变随机响应。本文将新近发展起来的演变随机响应问题的统一解法 ,推广到用于求解随机结构振动响应问题。首先用这一方法求出每个样本结构的随机响应 ,然后用MonteCarlo法来进一步求随机结构的集合随机响应特性。这样 ,与单纯用Monte Carlo法进行数字模拟相比 ,可使计算工作量大为减少。本文用随机剪切柱的演变随机响应问题加以说明

Evolutionary Random Response Analysis of Random Shear Column under Earthquake Excitation

The evolutionary random response of a random shear column under Niigata earthquake excitation was analyzed. Here, the unified approach for evolutionary random response problems was applied to the sample systems. Then, the Monte Carlo method was used to acquire ensemble mean square response by taking the length parameter of the shear column as a random variable. It is shown that the computation effort of the numerical simulation can be greatly reduced, by using such approach. And the method presented in this paper can also be used to solve more complicated practical vibration problems.