舰船尾部振动的水弹性模型

采用三维水弹性理论导出了舰船尾部振动的流固耦合运动方程式；用三维结构混合有限元和三维流体边界元建立了舰船尾部振动的水弹性分析离散模型．提出了中型水面舰艇尾部整体振动的预报方法；编制了相应的计算机程序．对两型舰艇的尾部振动进行了分析计算，结果表明，预报值与实测值比较吻合．研究结果可对中型水面舰艇的减振降噪设计提供预报手段，从而改善舰船的尾部振动环境．

The Hydroelastic Model for Calculating the Aft Part Vibration of Ships

The paper derives a fluid structure interaction equation of motion for aft part vibration of ships by use of 3 dimensional hydroelasticity theory. Based on 3 dimensional structure finite element method and 3 dimensional fluid boundary element mehtod, the authors establish a discretized model for hydroelastic analysis of aft part vibration of ships, give a prediction method for aft part vibration of medium size surface vessels, develop a set of computational programs on the micro IBM computer, calculate aft part vibration of two kinds of naval ships. The numerical results are in fairly good agreement with the experimental measure ments. The work presented in this thesis has provided a tool for the design of noise and vibration reduction of the medium size sarface vessels and improvement of the environment of stern.