针对采用吊舱推进器的邮轮建立4种尺度的有限元模型，各尺度模型均包含2种类型：A类以质量点模拟吊舱推进器，B类建立吊舱推进器的三维有限元模型。分别对两类有限元模型进行模态分析，通过比较固有频率来分析吊舱推进器与主船体的振动耦合效应。通过振动模态对比，确定结构动力学计算的最佳模型尺度范围，并在此基础上进行推进器舱振动响应分析。结果表明，在模型较大时，吊舱推进器对结构扭转振动耦合影响最大，而在计算模型范围较小时，其对水平振动耦合影响最大；垂向速度响应的最大值并没有出现在激励力正上方，而是位于2个吊舱推进器之间的船中区域。本文结论可为船体尾部振动优化分析与邮轮设计提供参考。
The cruise ship is equipped with pod propulsion. Four different dimensions of cruise ship's FEM model are built according to the cruise's structure drawing. Each scale contains two different types of FEM model in which type A uses mass point to simulate the pod propulsion and type B uses FEM models to simulate the pod propulsion. In order to Estimate the coupling vibration between cruise body and pod propulsion, modal analysis is conducted in both type A and type B models. Comparing the modal and frequency to choose the optimal FEM dimension in ship structural dynamics analysis and calculating the structural frequency response. The results show that the greatest coupling influence of the pod propeller occurs in torsional and horizontal vibration when the calculation model is relatively large and small, respectively. The maximum value of the vertical velocity response appears in the midship between the two pod thrusters, rather than just above the excitation force. The conclusions in this paper can provide reference for the ship stern vibration optimization analysis and cruise ship design.
2019,41(6): 66-70 收稿日期：2018-05-06
DOI：10.3404/j.issn.1672-7649.2019.06.014
分类号：P751
作者简介：赵鹏飞(1992-),男,硕士研究生,研究方向为船体结构强度与动力学分析
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