楼云锋, 刘涛, 王欢欢, 付宝强, 金先龙. 波浪冲击下充气式浮桥流固耦合数值模拟分析[J]. 工程力学, 2018, 35(9): 232-239,256. DOI: 10.6052/j.issn.1000-4750.2017.05.0337
引用本文: 楼云锋, 刘涛, 王欢欢, 付宝强, 金先龙. 波浪冲击下充气式浮桥流固耦合数值模拟分析[J]. 工程力学, 2018, 35(9): 232-239,256. DOI: 10.6052/j.issn.1000-4750.2017.05.0337
LOU Yun-feng, LIU Tao, WANG Huan-huan, FU Bao-qiang, JIN Xian-long. DYNAMIC FLUID-STRUCTURE INTERACTION ANALYSIS OF GASBAG-TYPE FLOATING BRIDGES UNDER WAVE IMPACT[J]. Engineering Mechanics, 2018, 35(9): 232-239,256. DOI: 10.6052/j.issn.1000-4750.2017.05.0337
Citation: LOU Yun-feng, LIU Tao, WANG Huan-huan, FU Bao-qiang, JIN Xian-long. DYNAMIC FLUID-STRUCTURE INTERACTION ANALYSIS OF GASBAG-TYPE FLOATING BRIDGES UNDER WAVE IMPACT[J]. Engineering Mechanics, 2018, 35(9): 232-239,256. DOI: 10.6052/j.issn.1000-4750.2017.05.0337

波浪冲击下充气式浮桥流固耦合数值模拟分析

DYNAMIC FLUID-STRUCTURE INTERACTION ANALYSIS OF GASBAG-TYPE FLOATING BRIDGES UNDER WAVE IMPACT

  • 摘要: 采用多物质ALE (Arbitrary Lagrangian-Eulerian)方法对充气式浮桥进行多工况数值模拟分析,流体区域采用ALE描述,浮桥结构采用Lagrangian描述,并通过罚函数方法实现两者间的耦合作用。首先建立三维充气式浮桥-流体耦合动力学模型,并通过与波浪理论公式和物理模型试验数据对比,验证本文采用的数值造波和流固耦合建模方法的可行性;随后展开初始工况、移动载荷工况、波浪冲击工况下浮桥结构响应的计算和分析。结果表明:随着载重增加,囊体垂向位移和应力随着增加;相比于陆上工况,海上浮囊平衡时垂向位移增加,应力明显减小;波浪冲击中最大铰链接触力和最大囊体应力出现在浮桥两端,最大铰链弯矩出现在中段;随着波高的增加,囊体应力增大。

     

    Abstract: The numerical simulation analysis of gasbag-type floating bridges (GTFBs) under various conditions were studied using the multi-material ALE (Arbitrary Lagrangian-Eulerian) method. The fluid was described by the ALE method, the structure was described by the Lagrangian method and the coupling process between the structure and fluid was achieved by the penalty method. Floating bridge-fluid coupling models were constructed. The models and approaches were validated by comparing with the wave theory and experimental data. The structural responses of the GTFB under gravity, moving load and wave impact were analyzed. The results show that the vertical displacement and stress of the gasbag were raised by increasing the mass of the moving load. Compared with the land condition, the vertical displacement of the gasbag increases and the stress reduces significantly. The maximum contact force of the hinge and the maximum stress of the gasbag appear at the ends of the floating bridge, and the maximum bending moment of the hinge appear in the middle section. The stress of the gasbag was raised by increasing the height of the wave.

     

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