When analyzing the structural strength of ship and offshore structure, the relevant parameters are given fixed values in the traditional method.

在船舶与海洋结构物结构强度的常规计算方法中，将有关参数都取为定值。

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The rock mass structural parameter concept consisting of the geometric and mechanical characteristic parameters being posed and the structural parameter values of rock mass at this site are presented.

文中提出了由岩体结构几何特征参数和力学特性参数所构成的岩体结构参数概念，并提供了三峡工程坝基岩体结构参数值。

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The errors between optimization values and theoretic results of the compression load and stress are 7.4% and 9% respectively. This method is effective to optimize structural parameters.

压缩负荷和应力的优化结果与理论计算值的误差分别为7.4%、9%，因此，利用神经网络和遗传算法进行结构参数优化的方法是可行的。

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