常规散射特性计算方法如矩量法中的广义阻抗矩阵在谐振频率点上条件数过大，导致计算不准确。
The regular numerical algorithm is MOM, whose general impedance matrix has a large condition number at the resonance frequency points, which brings an inaccurate result.
用有限元传递矩阵法分析火炮身管固有振动特性，矩阵阶次低，计算所得的固有频率与实际固有频率接近，误差在允许的范围内。
Matrix step is low by using the finite element transfer matrix method. Natural frequency by calculation approaches to actual natural frequency and the error is allowable.
依据设计原则，利用模态刚度矩阵、模态质量矩阵和模态频率相似进行了扭振模拟机轴系的设计，扭振模拟机轴系前三阶固有特性与实际机组轴系扭振动特性基本一致。
By modal stiffness matrix, modal mass matrix and modal frequency, shaft units of simulator is designed. The former three steps natural characteristics are identical with the real units'.
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