近30年来，随着社会经济的快速发展和跨海互联互通需求的不断增加，浮桥开始应用于现代基础设施中来，以解决跨越宽而深邃的峡湾或海峡的问题。本课题基于多维-多相-多体数值模拟技术，建立了浮桥动力学模型，在此基础上，研究跨越湖泊、河流、以及宽广深邃峡湾(或海峡)的浮式桥梁的一般性结构设计方法，探索如何经济、可靠地进行浮式桥梁方案设计。对世界范围内的浮桥技术和相关数值模拟技术进行了概括总结，为后续研究提供理论基础；以桥梁工程基本设计理念和海洋工程研究方法，对浮桥关键结构—浮体进行研究；在以上研究基础上，针对现有数值模拟方法的不足，建立了粘性流体-多体结构-阻尼系统-系泊系统耦合的数学模型；基于提出的浮桥动力学模型，对浮桥机理进行计算、分析和研究；基于模糊数学理论和多目标进化优化算法，建立浮桥设计方案的比选模型和浮桥结构优化模型，对不同建设条件的浮桥适用性进行研究并对浮桥结构进行优化设计。开展浮式桥梁方案设计关键技术的研究，对于推动我国绿色交通建设、发展海洋工程技术、解决峡湾横渡问题具有极其深远的战略意义。

In recent 30 years, with the rapid development of social economy and the increasing demand for cross sea interconnection, floating bridges have been applied to modern infrastructure to solve the problem of crossing wide and deep fjords or Straits. Based on the multi-dimensional multiphase multi-body numerical simulation technology, the dynamic model of floating bridge is established. On this basis, the general structural design method of floating bridge crossing lakes, rivers and broad and deep fjords (or Straits) is studied, and how to carry out the design of floating bridge economically and reliably is explored.The floating bridge technology and related numerical simulation technology in the world are summarized to provide a theoretical basis for follow-up research; Based on the basic design concept of bridge engineering and the research method of ocean engineering, the floating body, the key structure of floating bridge, is studied; Based on the above research, aiming at the shortcomings of the existing numerical simulation methods, the mathematical model of viscous fluid, multi-body structure, damping system and mooring system coupling is established; Based on the proposed dynamic model of floating bridge, the mechanism of floating bridge is calculated, analyzed and studied; Based on fuzzy mathematics theory and multi-objective evolutionary optimization algorithm, the comparison model of floating bridge design scheme and floating bridge structure optimization model are established, the applicability of floating bridge under different construction conditions is studied, and the floating bridge structure is optimized; The design method of floating bridge is summarized.The research on the key technologies of floating bridge design has extremely far-reaching strategic significance for promoting China's green transportation construction, developing marine engineering technology and solving the problem of fjord crossing.