一种新的基于脉冲激励的内损耗因子获取方法

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (12) : 161-164.

论文

一种新的基于脉冲激励的内损耗因子获取方法

张永杰肖健韦冰峰王喆

作者信息 +

A new mthod for estimating damping loss factor based on multi-pulse excitation

Zhang Yongjie XIAO Jian Wei Bingfeng WANG Zhe

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摘要

根据稳态能量流法和瞬态衰减法各自的原理和优缺点，利用脉冲激励和稳态能量流法的思想，提出了一种新的基于脉冲激励的内损耗因子获取方法。该方法克服了稳态能量流法和瞬态衰减法的不足之处。使用此方法通过试验获取了一块金属板的内损耗因子。将该方法与瞬态衰减法计算的内损耗因子和结构损耗因子进行了比较，结果表明该方法计算的结果具有较高的精度。

Abstract

It was summarized that the principles as well as advantages and disadvantages of impulse decay method and steady state power flow method. A new mthod for estimating damping loss factor based on pulse excitation was proposed using the idea of impulse excitation and power flow. The method overcomed the defects of conventional methods.The damping loss factor of a thin steel plate was estimated using this mehtod. The results obtained by this method and Impulse decay method were compared. The result of comparison showed that more accurate damping loss factor could be obtained by the new method.

导出引用

张永杰肖健韦冰峰王喆. 一种新的基于脉冲激励的内损耗因子获取方法[J]. 振动与冲击, 2014, 33(12): 161-164

Zhang Yongjie XIAO Jian Wei Bingfeng WANG Zhe. A new mthod for estimating damping loss factor based on multi-pulse excitation[J]. Journal of Vibration and Shock, 2014, 33(12): 161-164