复合材料板壳任意位置处载荷识别  

Load identification of arbitrary positon for composite plates and shells

作　　者：宋振[1] 郑世杰[1] 

机构地区：[1]南京航空航天大学航空宇航学院智能材料与结构航空科技重点实验室,南京210016

出　　处：《航空动力学报》2010年第10期2223-2228,共6页Journal of Aerospace Power

基　　金：国家自然科学基金(10772077;50830201);航空科学基金(2007ZD52047)

摘　　要：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.A discriminance method was proposed to identify the element with concentrated load,which was judged by the geometrical relationship between the abscissa,vertical coordinates of load point generated from genetic algorithm（GA） and four edges of every element.Furthermore,the load was allocated to nodes of the element by the equivalent distribution principle.Finally,the location of arbitrary concentrated load was identified by finite element analysis and the superior global search capacity of GA.Compared with the identification methods of neural network and inverse finite element analysis method.The presented method is able to identify the concentrated load locating at the interior of a element,and the numerical examples show that this method has higher accuracy.

关 键 词：遗传算法 载荷识别 有限元法 等效分配 自诊断 

分 类 号：TB381[一般工业技术—材料科学与工程]