振动台在无限流体域中台面附加质量研究

 船舰外壳装有声纳传感器用来接收来自水下的声纳信号，船体的振动必然会对声纳传感器的工作产生影响，因此有必要设计水下振动台来模拟水中船体的振动，然后在振动台的台面上安装传感器来进行模拟研究．设计一个工作台面在水体中的振动台，必须考虑水介质对台面的附加影响，这对振动台所需的推力设计、台面几何形状设计等是十分重要的．从振动台台面流固耦合运动方程出发，通过有限元方法，分别计算了台面在空气中和水下振动的加速度谐响应．通过比较台面上不同部位上几个关键结点耦合前后平均加速度值的变化，计算出了各个频率下的附加质量，并对附加质量给振动台设计带来的影响进行了研究．

Research on additional mass when vibration table vibrates in infinite liquid

Sonar sensors are fixed on the crust of galley to receive sonar signals from underwater and the vibration of galley itself must have influenced on them. So it is necessary to design a under\|water vibration table to simulate the vibration of galley, and sensors are fixed on the board to simulate the fact. To design a vibration table whose board is under water, the additional mass must be taken into account, which is very significant to affect the design of the thrust of the vibration table and shape of table board. Solid\|fluid coupling equation is put forward firstly. Then acceleration frequency response is figured out by finite element methods. Comparing with the accelerations of two different conditions, additional masses are calculated. At last, the influences carried by additional mass during the designing of vibration table are analyzed.