潜艇动力舱浮筏隔振参数对振动与声辐射的影响

降低动力机械引起的潜艇壳体振动以及水下声辐射一直是工程上的一个重要问题。本文利用ANSYS有限元软件，建立了潜艇动力舱的水下声振耦合模型。通过数值计算，分析了主动力浮筏隔振系统中的参数变化，如上下隔振器的刚度、筏体的质量比和刚度改变对动力舱内振动传递率以及水下辐射噪声的影响。本文建立的计算模型可进一步推广应用于因机械设备引起的整个潜艇水下耦合声振预报。

Effects of Parameters of Floating Raft Isolating System on Vibro-acoustic Characteristics Viewing from a Simulated Submarine Power Cabin

Prediction and depression of vibration and noise radiation of submarine is a key problem in naval engineering.Acoustic design of submarine must be made in a whole concept.For a simulated submarine power cabin equipped with floating raft isolating systems,a fluid structural coupled model is built up by finite element software ANSYS.The vibration transfer function and radiated acoustic power are computed under different parameters of isolating system,which are stiffness of the first stage vibration isolator,stiffness of the second stage vibration isolator,raft mass ratio and raft stiffness.This method can be further used to predict coupled vibro acoustic behavior of a real submarine.