On the Region for the Application of Passive Damping Treatment and Loss Factor Enhancement

IF 0.8 4区工程技术 Q4 ACOUSTICS

International Journal of Acoustics and Vibration Pub Date : 2019-12-31 DOI:10.20855/ijav.2019.24.41432

T. K. Joseph, K. Renji, K. Venkatraman

引用次数: 2

Abstract

The loss factor of a structure is significantly improved by using constrained damping treatment. For a mass efficient design, the damping material is to be applied at suitable locations. The studies reported in literature use the modal strain energy distribution in the viscoelastic material or the strain energy distribution in the base structure as tools to arrive at these suitable locations for the damping treatment. It is shown here that the regions identified through the above criteria need not be suitable for certain bending modes of vibration. A new approach is proposed in which the strain in the viscoelastic material and the angle of flexure are shown to be more reliable in arriving at the locations for the damping treatment. Providing damping layers at identified locations using these parameters results in significant loss factors with minimal added mass.

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论被动阻尼处理和损耗因子增强的应用领域

采用约束阻尼处理可以显著提高结构的损耗系数。对于质量有效的设计，阻尼材料应应用在合适的位置。文献中报道的研究使用粘弹性材料中的模态应变能分布或基础结构中的应变能分布作为工具，以到达这些合适的位置进行阻尼处理。这里表明，通过上述标准识别的区域不需要适用于某些弯曲振动模式。提出了一种新的方法，其中粘弹性材料中的应变和弯曲角被证明在到达阻尼处理的位置时更可靠。使用这些参数在确定的位置提供阻尼层会导致显著的损失因子，同时增加的质量最小。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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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