Characteristics analysis of a pneumatic impact hammer used for secondary path pre-identification

被引：0

作者：

Li F. ^{[1
]}

Yang T. ^{[1
]}

Wu L. ^{[2
]}

Xu Y. ^{[2
]}

Li W. ^{[1
]}

Li X. ^{[1
]}

Zhu M. ^{[1
]}

机构：

[1] College of Power and Energy Engineering, Harbin Engineering University, Harbin

[2] Tsingtao Innovation and Development Base, Harbin Engineering University, Qingdao

来源：

Zhendong yu Chongji/Journal of Vibration and Shock | 2024年 / 43卷 / 05期

关键词：

active vibration control; pneumatic impact hammer; secondary path pre-identification; simulation; test studies;

D O I：

10.13465/j.cnki.jvs.2024.05.018

中图分类号：

学科分类号：

摘要：

Here, aiming at the problem of pre-identification of secondary path in active vibration reduction system of marine mechanical equipment, a pneumatic impact hammer was developed as excitation force source. To understand characteristics of pneumatic hammer, simulation and test studies were conducted for them. Firstly, by establishing a thermal-mechanical coupled model for gas doing work process of pneumatic hammer and a dynamic model for hammer impact process, mathematical-physical relations among hammer impact speed, impact force and impact time were obtained. Simulation and test results of piston assembly working process were analyzed contrastively. Then, effects of structural dynamic parameters of resetting spring stiffness, viscous damping between piston and cylinder wall, and dead zone volume inside cylinder on hammer impact speed were explored. Finally, simulation and test results of pneumatic hammer impact force were analyzed contrastively, and transfer function testing of elastic structure was performed using pneumatic hammer. Testing results were compared with those using traditional force hammer excitation to verify the feasibility and effectiveness of the developed pneumatic hammer in testing structural dynamic characteristics parameters. © 2024 Chinese Vibration Engineering Society. All rights reserved.

引用

页码：166 / 172

页数：6

共 15 条

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