人工神经网络在双向板弹性内力计算中的应用

Application of Artificial Neural Network in Elastic Internal Force Analysis of Two Way Slab

将人工神经网络技术应用于结构内力分析。介绍了前馈型BP神经网络的模型及其算法 ,在分析双向板弹性内力时 ,建立了一个三层的BP网络 ,将该网络进行训练后计算四边简支双向板跨中弹性最大弯矩。在分析时 ,为了增强网络的推广能力 ,还以权值的修正量作为参考的收敛标准 ;同时 ,为了加快学习速率而不导致振荡 ,还采用了增加动量系数的方法来修改反传中的学习速率。BP网络的分析程序采用Matlab编制。

In this paper, the Artificial Neural Network (ANN) is applied to the internal force analysis of structure. After introducing the model and algorithm of back-propagation network, a trained BP network of three layers is used to calculate the maximum of elastic moment of middle span of two-way slab. In order to enhance the generalized capability of network, the modified value of weight should be regarded as convergence standard and in order to accelerate the learning process without vibration, the method of adding momentum coefficient is adopted. The analysis program of BP network is carried out with the software of Matlab. The result demonstrates that application of ANN in structure analysis is feasible.