【摘要】 以舰艇结构振动与噪声预报为研究背景,采用有限元和边界元相结合的方法研究水下航行器的振动和声辐射特性,提出对流固耦合界面、流场边界的处理方法,并采用模态试验对理论计算模型进行修正;通过对实验及计算结果的分析,探索了流体、圆柱形壳体、动力装置和隔振器组成的流固耦合体的动力学特性,为舰艇结构声学设计提供了参考。更多还原

【Abstract】 Based on the submarine structure, the vibration and acoustic radiation behavior of the submarine is studied with a combination method of FEM and BEM. In this paper, a fluidstructural coupling model, which is involved in shell structure, vibration isolator, engine and water, is created. The theoretical model is modified by the results of experiment. Vibration transfer function, radiated acoustic pressure, radiated acoustic power and radiated acoustic efficiency are calculated for different structural paramenters of vibration isolator and cylinder shell. The rule of vibration transmission and acoustic radiation for the submarine is obtained by analyzing the results of calculation and experiment. The analysis method can be further used for acoustic prediction and design of a real submarine.更多还原