采用solid45单元,做一个细长梁分析,截面2*2,长度100,用分块兰索法 算模态,有个扭转阵型,采用实体单元,这个单元只有3个自由度,如何能出扭转振型?
SOLID45 is used for the 3-D modeling of solid structures. The element is defined by eight nodes having three degrees of freedom at each node: translations in the nodal x, y, and z directions