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.
出处
《鱼雷技术》
2015年第6期439-443,共5页
Torpedo Technology
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
torpedo engine
modal contribution
support structure
modal analysis
damping vibration attenuation
