| 典型船舶悬臂基座阻抗特性研究 |
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| 引用本文： | 王月, 沈志华, 肖伟, 张攀, 刘均, 程远胜. 水下结构物长基座拓扑与尺寸优化设计[J]. 中国舰船研究, 2019, 14(6): 147-154. DOI: 10.19693/j.issn.1673-3185.01461 |
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| 作者姓名： | 王月 沈志华 肖伟 张攀 刘均 程远胜 |
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| 作者单位： | 1.华中科技大学 船舶与海洋工程学院, 湖北 武汉 430074;2.中国舰船研究设计中心, 湖北 武汉 430064;3.高新船舶与深海开发装备协同创新中心, 上海 200240 |
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| 摘 要： | 目的 基座结构的阻抗值及不同加载点间的阻抗均匀性会影响水下结构物辐射噪声。 方法 以一典型水下结构物长基座结构为研究对象，将基座腹板单元密度作为设计变量，提出以提高基座阻抗均匀性为目标的拓扑优化数学模型，并根据优化结果提出有效的腹板开孔形式。在此基础上，以基座各板厚作为设计变量，同时将基座的阻抗值及阻抗均匀性作为目标，建立基于宽容排序法的多目标尺寸优化数学模型，获得基座面板、腹板和肘板板厚优化方案。 结果 拓扑结果表明，基座腹板上并不以相同的模式开孔，且腹板开孔中心与其几何中心不同。尺寸优化结果表明，改变基座面板、腹板以及肘板板厚的搭配，可使案例阻抗离散度最大值减小9.37%，同时基座重量降低33.31%，且加载点阻抗最小值基本不变。 结论 为了提高不同加载点间的阻抗均匀性，不宜在基座腹板上以相同的模式开孔；为了兼顾阻抗均匀性和阻抗值，基座各构件不同区域板厚可不相同。研究结果可为水下结构物基座优化设计提供参考。
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| 关 键 词： | 基座 阻抗 拓扑优化 尺寸优化 |
| 收稿时间： | 2018-10-17 |
Research on impedance characteristics of cantilever base for typical ship |
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| Wang Yue, Shen Zhihua, Xiao Wei, Zhang Pan, Liu Jun, Cheng Yuansheng. Topology and size optimization design of a long underwater foundation[J]. Chinese Journal of Ship Research, 2019, 14(6): 147-154. DOI: 10.19693/j.issn.1673-3185.01461 |
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| Authors: | Wang Yue Shen Zhihua Xiao Wei Zhang Pan Liu Jun Cheng Yuansheng |
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| Affiliation: | 1.School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;2.China Ship Development and Design Center, Wuhan 430064, China;3.Collaborative Innovation Center for Advanced ship and Deep-Sea Exploration, Shanghai 200240, China |
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| Abstract: | Objectives Both the mechanical impedance of the foundation and the homogenization of foundation impedance among loading points can affect the radiation noise of underwater structures. Methods The mechanical impedance of a typical long underwater foundation was studied. A mathematical topology model in which the density of web plate was set to be the design variable was established to improve the homogenization of foundation impedance. An effective form of web perforation was put forward according to the result of topology optimization. On this basis, a multi-objective size optimization mathematical model based on tolerance ranking method was proposed. The thicknesses of plates constituting the foundation were used as design variables while the objective was to maximize the mechanical impedance and impedance uniformity simultaneously. Finally an optimum proposal of thicknesses of face plates, webs and knee plates was found. Results The result of topology optimization indicates that hole formed on foundation webs are not the same, and the centers of holes do not coincide with web centers. The size optimization result shows that the maximum dispersion of foundation impedance can be reduced by 9.37% with 33.31% weight saving, while the minimum mechanical impedance remains nearly unchanged by redistributing the material in plates of the foundation by matching thicknesses of face plates, webs and knee plates. Conclusions In order to improve the impedance homogenization among loading points, forms of perforations on foundation webs should not be the same. And foundation components in different areas can be different in order to take into account both the mechanical impedance and impedance homogenization. The study in this paper can provide reference for the optimal design of underwater structure foundation. |
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| Keywords: | foundation impedance topology optimization size optimization |
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