(2)正则模态矩阵为了使模态分析更简便,常把主座标{q}正则化为正则坐标{q}_N。正则化可以有多种方式,常用的一种是将模态质量矩阵正则化为单位矩阵[Ⅰ]。由于模态质量矩阵的对角线元素M_r(r=1,2,…,n)之值通常是不尽相等的,所以在正则化时,必须对每一阶主振型选择一个适当的因子使M_r=1,这种因子a_r称为r阶的正则化因子。 (2) Regular modal matrix In order to make the modal analysis more convenient, the principal coordinate {q} is regularized to the regular coordinate {q} _N. Regularization can have a variety of ways, one of the commonly used is to regularize the modal mass matrix into a unit matrix [I]. Since the values ​​of the diagonal elements M_r (r = 1, 2, ..., n) of the modal mass matrix are usually not equal, an appropriate factor must be chosen for each order of the main modes Let M_r = 1, and this factor a_r is called the r-th regularization factor.