基于模态贡献量法支撑结构振动控制方法  

Vibration Control of Engine Support Structure Based on Modal Contribution Method

作　　者：宋文[1] 梁跃[1] 高爱军[1] 李志敏 孙岩 白伊明 

机构地区：[1]中国船舶重工集团公司第705研究所,陕西西安710075 [2]山西平阳重工机械有限责任公司,山西侯马043003

出　　处：《鱼雷技术》2015年第6期439-443,共5页Torpedo Technology

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20～1000Hz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。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.

关 键 词：鱼雷发动机 模态贡献量 支撑结构 模态分析 阻尼减振 

分 类 号：TJ630.32[兵器科学与技术—武器系统与运用工程]