摘要
动力设备线谱振动经基座传递至船体结构,引起的低频声辐射是船舶水下噪声的主要来源之一。针对单向集中力控制通常难以抑制动力设备振动向弹性基础传递且辐射噪声衰减效果有限的问题,提出基于路径控制体多自由度振动控制的振动传递路径控制方法,切断路径功率流传递。根据广义变分原理建立动力设备-可控隔振单元-壳体系统的耦合动力学模型,通过振动功率流分析揭示振动能量多自由度传递机理,明确基于多自由度控制的路径可控性。在此基础上,构建局部多通道耦合控制与全局分散控制相结合的控制策略,通过数值计算与实验验证基于多自由度控制的振动传递路径控制效果。结果显示,相比于单向集中力控制,基于多自由度控制的方法可有效阻止功率流传递,实现更加显著的壳体振动衰减。
The excitation of power machinery through its support is one of the main sources of underwater low-frequency radiation for marine vessels.Aiming at the problem that the single-DOF(Degree of Freedom)centralized force control is often difficult to control the vibration transmission from the power machinery to the elastic foundation and the control performance of the radiated sound is limited,a vibration transmission path control method based on the multi-DOF vibration control of the path control unit is proposed,which can effectively cut off the transfer path of power flow.The dynamic model of the power machinery-controllable vibration isolation unit-hull system for vibration control is built based on the generalized variational principle,the multi-DOF vibration transmission mechanism is revealed through power flow analysis,and the feasibility of multi-DOF vibration transmission control is analyzed.On this basis,the global decentralized control and the local coupling control strategies are constructed,the vibration transmission path control performance based on the multi-DOF control is verified by numerical calculation and experiment.The results show that the multi-DOF path control method can effectively prevent the transmission of the power flow and achieve more significant hull vibration attenuation than the single-DOF centralized force control method.
作者
谢溪凌
任明可
张志谊
XIE Xiling;REN Mingke;ZHANG Zhiyi(State Key Laboratory of Mechanical Systems and Vibration,Shanghai Jiao Tong University,Shanghai 200240;AECC Commercial Aircraft Engine Co.,Ltd.,Shanghai 200241)
出处
《机械工程学报》
EI
CSCD
北大核心
2023年第21期224-233,共10页
Journal of Mechanical Engineering
基金
国家自然科学基金资助项目(52101363,51875363)。
关键词
主被动隔振
动力设备线谱振动
多自由度振动传递控制
分散控制
active/passive isolation
tonal vibrations of power machinery
multi-degree-of-freedom path control
decentralized control
