Stiffness-Damping Matching Modelling for Vibration Isolation System of Roadheader ECB

IF 0.8 4区工程技术 Q4 ACOUSTICS

International Journal of Acoustics and Vibration Pub Date : 2020-03-30 DOI:10.20855/ijav.2020.25.11514

Li Zhanlong, Sun Dagang, Qin Yuan, Z. Wenjun, Sun Bao

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引用次数: 1

Abstract

The electronic control box (ECB) is a key and precise component of a roadheader. The vibration of the ECB is an increasingly prominent issue as the machine capacity grows. In order to promote the isolation effect of the ECB, a whole-body vibration model considering the cutting effect is derived, based upon which the stiffnessdamping matching strategy for the ECB isolator is acquired. For engineering application, the tubular constrained damping isolator (TCDI) is developed based on the constrained damping theory and the matching strategy. The theoretical results show that the isolation effect of the ECB isolator strengthens as the stiffness coefficients decline and the damping coefficients increase. The configurations with larger rear stiffness coefficients and larger front damping coefficients could lead to a better vibration control effect. The experiment results indicate that the TCDI exhibits a greater capability of isolating the impact excitation than the traditional E-type isolator, thus verifying the whole-body vibration model for the roadheader and the matching strategy for the ECB isolator. This research can provide theoretical and practical references for the investigation of the dynamic behaviour of complex viscoelastic structures.

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掘进机ECB隔振系统刚度-阻尼匹配建模

电子控制箱(ECB)是掘进机的关键和精密部件。随着机器产能的增长，欧洲央行的波动是一个日益突出的问题。为了提高ECB的隔振效果，推导了考虑切割效应的全身振动模型，在此基础上获得了ECB隔振器的刚度-阻尼匹配策略。针对工程应用，基于约束阻尼理论和匹配策略，研制了管状约束阻尼隔振器。理论结果表明，ECB隔振器的隔振效果随着刚度系数的减小和阻尼系数的增大而增强。较大的后刚度系数和较大的前阻尼系数配置可以获得较好的减振效果。实验结果表明，TCDI比传统的e型隔振器具有更强的隔振能力，从而验证了掘进机整体振动模型和ECB隔振器的匹配策略。该研究可为研究复杂粘弹性结构的动力特性提供理论和实践参考。

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来源期刊

International Journal of Acoustics and Vibration ACOUSTICS-ENGINEERING, MECHANICAL

CiteScore

1.60

自引率

10.00%

发文量

审稿时长

12 months

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