Analysis on the damping characteristics of resonance changers based on the wave theory

Zhongguo Jianchuan Yanjiu

Zhao Yao¹  Li Liangwei² 

[1] School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;The 92942 Unit of PLA, Beijing 100161, China;

关键词: Resonance Changer(RC);    marine shafting;    longitudinal vibration;    damping effect;    wave theory;   

DOI  :  10.19693/j.issn.1673-3185.01445

来源: DOAJ

【 摘 要 】

[Objectives]Resonance Changer (RC) is an effective vibration damping device,which receives much attention in the field of longitudinal vibration control of marine shafting. As the RC's damping effect is closely related to the internal structural parameters,[Methods]an analytical formula of sound pressure propagation in RC was derived based on the wave theory,and the physical relationship between the internal structural parameters and its vibration mechanism was constructed for engineering design. Then,the influence of design parameters of RC's external pipes and cavity on system insertion losses and sound pressure level in broad band as well as the sensitivity were analyzed.[Results]The results show that,RCs can control the resonance peak of the main system well at its natural frequency.[Conclusions]Attention should be paid to the external pipe size of RCs when considering the feature line spectrum suppression,and to the external cavity size when considering the overall control of sound pressure level in broad band.

【 授权许可】

Unknown