A back analysis method of viscoelastic rock mass is proposed in this paper, in which, pattern search (PS), genetic algorithm (GA), and neural network (NN) are naturally combined.

• 摘要把模式搜索嵌入目前广为应用的遗传算法中，使之和神经网络有机结合，提出了搜索-遗传-神经网络算法。