一致质量矩阵与集中质量矩阵是结构动力分析中常用的质量矩阵形式。
Consistent mass matrix and lumped mass matrixes are the common types of mass matrixes in structural dynamic analysis.
方法假定结构可以简化为集中参数系统，其质量矩阵是对角的。
By the methods it is assumed that a structural system can be reduced to a lumped parameter system, of which the mass matrix is diagonal.
在集中质量模型的基础上，运用传递矩阵法对辗环机的主轴进行数学建模。
Based on the model of concentrated parameters, mathematical model for the spindle of a bearing rolling machine is set up with transfer-matrix method.
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