噪声与振动控制2018，Vol.38Issue(z1)：487-490,4.DOI:10.3969/j.issn.1006-1355.2018.Z1.105
基于波速法的黏弹性细棒力学参数宽频测试
Determination of Dynamic Parameters of Viscoelastic Thin Bar using Wave-speed Measurement by Pulse Method
摘要
Abstract
A broadband method to identify the dynamic parameters of viscoelastic bar using wave-speed method by broad band pulse signal is presented. A sample bar is longitudinal excited by a shaker on which a controllable impulsive source method is employed to generate different impulse signals. The longitudinal vibration velocities of the free end of the bar and the driven end of the exciter are recorded by a laser vibrometer. The incident wave at the free end of the bar can be approximated by half of the measured longitudinal vibration velocity of the free end. Thus, the storage modulus and loss factor can be calculated over a wide frequency range by the complex velocity ratio using wave-speed method. The proposed method is experim experimetally ental lyverified by comparison with the viscoelastic apparatus test.关键词
振动与波/黏弹性/波速法/宽频脉冲/动态力学参数Key words
vibration and wave/viscoelastic/wave-speed method/broadband pulse/dynamic parameters分类
通用工业技术引用本文复制引用
卫政宇,侯宏,高南沙,刘哲..基于波速法的黏弹性细棒力学参数宽频测试[J].噪声与振动控制,2018,38(z1):487-490,4.基金项目
国家重点研发计划资助项目(2016YFF0200900) （2016YFF0200900）
国家自然科学基金资助项目(11474230) （11474230）
