• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2022, Vol. 58 ›› Issue (13): 129-136.doi: 10.3901/JME.2022.13.129

• 机械动力学 • 上一篇    下一篇

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基于全域与局域模式下波浪驱动推进机构动力学分析

冯展霞1,2, 常宗瑜1,2, 邓超1,2, 张嘉坤3, 赵林1,2, 郑中强1,2, 于振江1   

  1. 1. 中国海洋大学工程学院 青岛 266100;
    2. 山东省海洋工程重点实验室 青岛 266100;
    3. 北京理工大学机械与车辆学院 北京 100081
  • 收稿日期:2021-01-25 修回日期:2022-03-19 出版日期:2022-07-05 发布日期:2022-09-13
  • 通讯作者: 赵林(通信作者),男,副教授。主要研究方向为海洋工程技术、海洋软管、生态水利等。E-mail:zl_qingdao@163.com
  • 作者简介:冯展霞,女,博士研究生。主要研究方向为波浪滑翔机动力学。E-mail:925140319@qq.com
  • 基金资助:
    国家自然科学基金(51875540,51809245)和中央高校基本科研业务费专项(202061025)资助项目。

Dynamic Analysis of Wave-powered Propulsion Mechanism Based on Global-domain and Local-domain Modes

FENG Zhanxia1,2, CHANG Zongyu1,2, DENG Chao1,2, ZHANG Jiakun3, ZHAO Lin1,2, ZHENG Zhongqiang1,2, YU Zhenjiang1   

  1. 1. College of Engineering, Ocean University of China, Qingdao 266100;
    2. Key Lab of Ocean Engineering of Shandong Province, Qingdao 266100;
    3. School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081
  • Received:2021-01-25 Revised:2022-03-19 Online:2022-07-05 Published:2022-09-13

摘要: 波浪驱动航行器在海洋观测等领域发挥着重要的作用,波浪能驱动的水下推进机构是它们前进的核心部件,研究其在流场中的流体与刚体相互耦合作用,对于提高波浪驱动航行器的推进性能具有重要意义。基于刚体动力学方程与计算流体力学软件之间的交互耦合,分别建立了基于全域与局域模式下的波浪推进装置的流体-刚体耦合动力学模型,对两种模式下的计算结果进行了对比与分析。首先在全域模式下进行耦合动力学分析,在水下推进机构翼片行进和垂荡的整个区域建立流体网格,将其得到的水动力代入刚体运动方程得到其运动参数,然后将运动参数代入水动力模型中进行反复迭代。考虑到全域模式下所需流体区域范围大、计算量大的不足,因此在局域模式下,根据相对运动原理将翼片水平前进速度实时转化为作用于翼片上的反向来流,建立了基于局域模式的翼片流体-刚体耦合模型,实现在相对固定的区域进行有限元分析。避免了大范围区域建立有限元网格,计算效率大大提高。两种模式下的计算结果吻合,为波浪能直接驱动的推进机构的推进性能的分析和研究提供了有效的方法。

关键词: 波浪能驱动推进机构, 流体-刚体耦合, 全域模式, 局域模式, 计算效率

Abstract: Wave-powered vehicle play an important role in ocean observation field, among which the underwater propulsion mechanism directly driven by wave energy is the core component of them. Studying the interaction between fluid and rigid body in the flow field is of great significance for improving the propulsion performance of wave-powered vehicle. In this paper, fluid-rigid body coupling dynamic models are established in global-domain and local-domain modes respectively based on the interaction between rigid body dynamics equations and computational fluid dynamics software, and the calculation results of the two modes are compared and analyzed. Firstly, the coupled dynamics was analyzed in the global-domain mode, and fluid grids were established in the entire area by considering forward and heave motion of the underwater propulsion mechanism. Then the hydrodynamic force was substituted into the motion equation of rigid body to obtain its motion parameters, and motion parameters were substituted into the hydrodynamic model for repeated calculations. Considering the disadvantages of large fluid area and large amount of calculation required in the global-domain mode, in the local-domain mode, according to the principle of relative motion, the forward motion of the fin was converted to the same velocity of the reverse flow to act on the fin. A fluid-rigid body coupling model of the fins in a local-domain mode was established, and finite element analysis was realized in a relatively fixed area. In the local-domain mode, the establishment of a finite element mesh in a large area can be avoided, and the calculation efficiency is greatly improved. The calculation results in the two modes are consistent, which provides an effective method for the analysis and research of the propulsion performance of the wave powered propulsion mechanism.

Key words: wave-powered propulsion mechanism, fluid-rigid body coupling, global-domain mode, local-domain mode, calculation efficiency

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