某船舶结构声学设计技术探讨

Research on acoustic design of a certain ship structure

以某船舶的噪声振动控制为目的,探讨了船舶结构声学设计技术.针对某船舶机舱结构,在初步设计的基础上,运用FEM/BEM方法,对比了不同设计参数下的船舶振动响应和水下辐射噪声声压级.通过调整机舱段结构参数,避免船体结构共振的发生,确定了低噪声设计方案.模型试验表明,振动传递特性的计算值与试验值有很好的一致性,所建立的船舶振动噪声预报模型是可信的.

Aiming at the control of vibration and underwater noise of ship , an acoustic design technology of ship structure is discussed .On the basis of original structure design of the ship′s engine room , the vibration responses and the sound radiation under water were compared under different design parameters by using the method of FEM/BEM.An acoustic design was determined by adjusting the engine room structure parameters avoiding the happening of the hull structure resonance .Model test showed that the calculated value of vibration transfer char-acteristics had good consistency with the test results and the vibration noise prediction model established was credible .