Based on modal perturbation method, a new approach is developed for solving the random seismic response of horizontal layered soil.
基于模态摄动方法，提出了层状土层随机地震反应的近似分析方法。
Simulation results show that the improved method has better quality, robustness and speed of convergence comparing with simulated annealing algorithm based on uniform distribution random perturbation.
通过计算机仿真，验证了该算法对初值的鲁棒性和复原的效果优于基于均匀分布随机扰动量模拟退火盲解卷积算法，提高了收敛到最优解的速度。
The direct modal perturbation based on selecting point by number-theoretic method is proposed to find the random response of un-damping linear random structures.
针对于多自由度线性复合随机结构的随机自振特性分析，提出了基于数论选点的直接模态摄动法。
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