Multiphysics modelling and experimental verification of a suspension ship running at head seas

逆海悬浮船多物理场建模与实验验证

• 批准号: 21K14363
• 负责人: 韓 佳琳
• 金额: $ 3万
• 依托单位: Yokohama National University (2022)Osaka Prefecture University (2021)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Early-Career Scientists
• 财政年份: 2021
• 资助国家: 日本
• 起止时间: 2021-04-01 至 2024-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21K14363/
• 关键词: Suspension ship; Multiphysics modelling; Motion reduction; Ship motion control; Wave energy harvesting; multiphysics modelling; multibody dynamics; suspension ship; ship motion control; skyhook control

Motion responses of the suspension ship in head waves were simulated in the time domain.Firstly, a mesh model of the twin hull was constructed. Then, the pressure of each panel on the surface of the hull was evaluated and integrated. The hydrodynamic coefficients and wave load of the twin-hull were derived from the panel model of the ship. Next, a simplified suspension ship model was built using OrcaFlex. The simulated motion responses of the suspension ship at the rigid and free modes were verified by comparing them with the towing tank experimental results. The results showed that the simulation model was reasonable. Finally, the control forces were tuned by changing the suspension’s spring stiffness and damping coefficients. It was found that the heave and pitch of the cabin could be reduced to a certain level. However, this also revealed the limitations of the passive control system, indicating that more advanced control strategies should be considered.In summary, a basic simulation model has been developed to predict the motion responses of a suspension ship in head waves at zero advancing speed.

对悬索船在迎浪中的运动响应进行了时域仿真。首先，建立了双船体网格模型。然后，对各壁板在船体表面上的压力进行了评估和积分。从船体模型出发，推导出了双体船的水动力系数和波浪载荷。接下来，使用OrcaFlex建立了一个简化的悬索船模型。通过与拖曳水池试验结果的比较，验证了悬挂船在刚体和自由两种模式下的运动响应。结果表明，该仿真模型是合理的。最后，通过改变悬架的弹簧刚度和阻尼系数来调整控制力。研究发现，舱体的升沉和俯仰可以减小到一定程度。然而，这也暴露了被动控制系统的局限性，表明需要考虑更先进的控制策略。综上所述，建立了一个基本的仿真模型来预测悬浮船在零推进速度下在迎浪中的运动响应。

项目成果

41st International Conference on Ocean, Offshore & Arctic Engineering

第41届国际海洋、近海会议

• 发表时间: 2022