Vibration Control of Engine Support Structure Based on Modal Contribution Method
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摘要: 为了有效控制鱼雷发动机支撑结构的振动响应, 研究了基于模态贡献量法的阻尼减振技术。首先阐明了模态贡献量法的基本原理, 然后计算了20~1 000 Hz频段内发动机支撑结构各阶模态的贡献量, 最后基于模态贡献量分析结果, 提出了自由阻尼层控制振动方案, 对贡献量大的优势模态进行了阻尼控制。对比减振前后的结果可以发现, 基于模态贡献量法的阻尼减振技术能够显著减小鱼雷发动机支撑结构的阻尼振动。该结果可为工程上的结构低振动设计提供参考。Abstract: Based on modal contribution method, this paper proposes a vibration attenuation with damping technique to effectively control vibration response of a torpedo engine support structure. Firstly, the basic principle of modal contribution is explained. Then, the contributions of different-order modals of the engine support structure are calculated in the frequency range of 20~1000 Hz. Finally, a vibration control scheme of free damping layer is proposed according to the analysis of the contributions, and damping control is exerted on the predominant modal with greater contribution. Comparison between the conditions with and without the damping control shows that the damping vibration attenuation technique based on modal contribution method can effectively reduce the damping vibration of a torpedo engine support structure.
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Key words:
- torpedo engine /
- modal contribution /
- support structure /
- modal analysis /
- damping vibration attenuation
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[1] 梁跃, 何长富, 彭博. 鱼雷热动力发动机机体振动模态分析[J]. 鱼雷技术, 2005, 13(4): 17-20.Liang Yue, He Chang-fu, Peng Bo, Structural Vibration Modal Analysis of Torpedo Thermal Power Engine[J]. Torpedo Technology, 2005, 13(4) : 17-20. [2] 傅志方. 振动模态分析与参数识别[M]. 上海: 上海交通大学出版社, 1989. [3] 李德葆. 实验模态分析及其应用[M]. 北京: 科学出版社, 2001. [4] 杜华军, 于百胜. 蜂窝锥壳卫星适配器约束阻尼层振动控制抑制分析[J]. 应用力学学报, 2003, 20(3): 5-9.Du Hua-Jun, Yu Bai-sheng. Vibration Suppression of a Conical Honeycomb Satellite Adapter Subjected to Constrained Layer Damping[J]. Chinese Journal of Applied Mechanics, 2003, 20(3): 5-9. [5] 杜华军, 黄文虎, 邹振祝. 航天支架结构的被动振动控制[J]. 应用力学学报, 2002, 19(3): 10-13.Du Hua-jun, Huang Wen-hu, Zou Zhen-zhu. Passive Vibration Control of Aerospace Supporter[J]. Chinese Journal of Applied Mechanics, 2002, 19(3): 10-13.
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