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New approaches for non-classically damped system eigenanalysis

机译:非经典阻尼系统特征分析的新方法

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摘要

This paper presents three new approaches for solving eigenvalue problems of non-classically damped linear dynamics systems with fewer calculations than the conventional state vector approach. In the latter, the second-order differential equation of motion is converted into a first-order system by doubling the size of the matrices. The new approaches simplify the approach and reduce the number of calculations. The mathematical formulations for the proposed approaches are presented and the numerical results compared with the existing method by solving a sample problem with different damping properties. Of the three proposed approaches, the expansion approach was found to be the simplest and fastest to compute.
机译:本文提出了三种新的方法来解决非经典阻尼线性动力学系统的特征值问题,其计算量少于常规状态向量法。在后者中,通过将矩阵的大小加倍,将二阶运动微分方程转换为一阶系统。新方法简化了方法并减少了计算数量。通过解决具有不同阻尼特性的样本问题,给出了所提出方法的数学公式,并将数值结果与现有方法进行了比较。在提出的三种方法中,发现扩展方法是最简单,计算最快的方法。

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