复合材料板壳任意位置处载荷识别

提出了一种受载单元判别法,根据遗传算法生成的染色体所对应的载荷作用点的横、纵坐标和每个单元四条边间的几何关系,判断出集中载荷作用的单元,再根据力的等效分配原则,把载荷等效分配到所在单元的节点上,进而基于有限元分析和遗传算法自身优越的全局搜索能力实现作用于复合材料结构网格节点或单元内部任意位置处的载荷识别.与现有的神经网络识别法和有限元反分析法相比,该方法具有能够识别非网格节点处的载荷的优点,且仿真算例表明其识别精度更高.

Load identification of arbitrary positon for composite plates and shells

In this paper, a discriminance method is proposed to identify the element where the concentrated load locates, which is judged by the geometrical relationship between the abscissa, vertical coordinates of load point generated from GA and four edges of every element. Furthermore, the load is allocated to nodes of the element by the equivalent distribution principle. Finally, the location of arbitrary concentrated load is identified by finite element analysis and the superior global search capacity of GA. Compared with the identification methods of inverse finite element analysis method and neural network, the present method has the advantage of being able to identify the concentrated load locating at the interior of a element and numerical examples show that this method has higher accuracy.