摘要
因舰船设备基座用金属材料的阻尼性能有限,开展高阻尼合金基座减振特性研究,利用阻尼合金材料的高阻尼特性可进一步提升基座减振能力。通过数值计算对比分析高阻尼合金基座与常规钢制基座的动力学特性,设计2种不同材料的典型基座,通过振动测试对比这2种材料基座的输入阻抗及振级落差指标。研究表明,等质量及板厚设计条件下,阻尼合金基座输入阻抗低于传统钢制基座的输入阻抗,基座振级落差较传统钢制基座可提高4 dB~7 dB。研究结果对高阻尼合金基座设计及减振性能优化具有一定指导意义。
The damping performance of conventional steel foundations is limited.The damping characteristics of high damping alloy foundations are studied so that the vibration reduction capability of the foundations are further improved by utilizing the high damping characteristics of damping alloy materials.Dynamic characteristics of high damping alloy foundation and conventional steel foundation are compared and analyzed by numerical calculation.Typical foundations of two different materials are designed.Input impedance and vibration level drop index of two material foundations are compared by vibration test.The research shows that the input impedance of damping alloy foundation is lower than that of traditional steel foundation under the condition of equal weight plate thickness,and the vibration level drop of the foundation is 4 dB~7 dB higher than that of traditional steel foundation.The research results have certain guiding significance for the design of high damping alloy foundation and the optimization of damping performance.
作者
周欣
武凯
邹夏景
ZHOU Xin;WU Kai;ZOU Xiajing(Shanghai The Third Military Representative Office,Naval Armament Department Shanghai Bureau,Shanghai 200031,China;Shanghai Division,China Ship Development and Design Center,Shanghai 201108,China)
出处
《船舶工程》
CSCD
北大核心
2024年第4期90-95,104,共7页
Ship Engineering
关键词
阻尼合金
基座
阻抗
振级落差
振动
damping alloy
foundation
impedance
vibration level difference
vibration
