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船体三维变形响应的数值预报

DOI: 10.3969/j.issn.1006-7043.201311053

Keywords: 舰船变形, 流固耦合, 三维水弹性方法, 模态分析, 变形响应, 数值预报

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Abstract:

针对航行中舰船变形问题,采用三维水弹性理论实现了波浪中舰船的动态变形预报。通过拟合不同模态下船体有限元模型的节点位移,实现了将三维模态信息应用于广义流固耦合界面条件。建立了舰船在规则波中的广义水弹性运动方程,求解出各阶振动模态的主坐标。将各阶弹性模态主坐标与预报位置的角变形矩阵相乘,得到角变形响应。针对某实船,分别采用三维水弹性方法和三维刚体方法进行计算,通过对船体结构角变形响应的对比,验证了三维水弹性方法的正确性,同时也证明了该方法在计算效率上的优势。

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