小水线面双体船船体振动差异特性与辐射噪声研究

Difference radiated noise and characteristic analysis of SWATH vibration caused by propulsion motor and diesel generating set

采用有限元法,基于某小水线面双体船设计图纸以及推进电机与柴发机组的安装位置,建立该型船整船有限元模型。对整船进行模态分析,得到其固有特性。以此为基础,分别计算推进电机激励和柴发机组激励下整船的振动传递函数,分析两激励引起船体振动和辐射噪声的差异特性,评估了两激励源单独作用下引起的水下辐射噪声,为该型船动力系统设计与振动噪声控制提供参考。

This article established the finite element model of the SWATH. This model includes propulsion motor, diesel generating set and hull of the ship. Modal analysis was done for the model and the natural frequencies of the ship were obtained. On this basis, the vibration transmission functions of the ship hull caused by the propulsion motor and the diesel generating set were analyzed, radiated noise and the characteristic of the ship vibration caused by these forces were studied. The results can be used as a database for ship propulsion system design and vibration control.