CAJ | 학술논문

利用波动理论分析L型连接板转角处阻振质量阻抑振动波传递的特性，基于阻抗失配和波形转换原理，将此阻抑技术引入壳体隔振设计中，数值计算壳体隔振设计前后的振动与声辐射性能，讨论阻振质量的重量和截面尺寸对其隔振性能的影响，并在此基础上根据模态控制法进一步对壳体隔振设计进行探讨。研究结果表明：将转角含阻振质量的L型连接结构引入壳体隔振设计，不仅能有效降低动力舱段结构的振动，而且还能显著隔离振动波向邻近舱段的传递；在总的阻振质量不变的前提下，合理地布置变质量变截面的阻振质量能显著提高总的隔振降噪效果。
이용파동이론분석L형련접판전각처조진질량조억진동파전체적특성，기우조항실배화파형전환원리，장차조억기술인입각체격진설계중，수치계산각체격진설계전후적진동여성복사성능，토론조진질량적중량화절면척촌대기격진성능적영향，병재차기출상근거모태공제법진일보대각체격진설계진행탐토。연구결과표명：장전각함조진질량적L형련접결구인입각체격진설계，불부능유효강저동력창단결구적진동，이차환능현저격리진동파향린근창단적전체；재총적조진질량불변적전제하，합리지포치변질량변절면적조진질량능현저제고총적격진강조효과。
In this paper,the vibration attenuating function of L-shaped plates with blocking mass is ana-lyzed based on the wave theory,and such attenuation techniques are introduced in the vibration isolating design of cabin shells by incorporating the principle of impedance mismatching and wave conversion. Par-ticularly,the vibration characteristics and sound radiation properties of the shell(with and without the blocking mass)are calculated numerically. Furthermore,the influence of the mass's weight as well as its sectional dimension on the vibration isolating performance is discussed,and an optimization design is pro-posed accordingly. The results show that the presented L-shaped plate not only reduces the vibration of en-gine cabins,but also significantly suppresses the vibration transmission to the adjacent cabins. Mean-while,it is observed that as long as the total weight of the isolation mass remains constant,arranging the blocking mass properly with variable weight and cross-sections could enhance the performance of vibration isolation and noise reduction.