自展浮体泛水展开临界状态动力学分析
Dynamic Analysis of the Critical State of Self-Expanding Floating Body When Water Overflows

自展浮体是一种依靠自身扭力杆实现泛水展开的可折叠浮体结构，但在研制设计过程中，扭力杆所需提供扭矩大小缺乏理论计算方法。本文对自展浮体的中箱和边箱分别采用运动学和动力学进行分析，根据运动学基本原理和力矩平衡原理，分别推导出了中箱和边箱的物理模型运功和受力解析表达式，对比了边箱的展开扭矩和扭力杆扭矩的变化趋势，从而对边箱展开的临界状态进行动力学分析，对自展浮体的设计计算，特别是扭力杆的选型，提供一定的理论依据。
The self-deploying floating body is a foldable floating body structure that can be deployed by flooding through its own torsion bars. However, during the research and design process, there is a lack of theoretical calculation methods for the torque required by the torsion bars. In this paper, kinematics and dynamics are respectively applied to analyze the middle box and side boxes of the self - deploying floating body. Based on the basic principles of kinematics and the principle of moment balance, analytical expressions for the motion and force of the physical models of the middle box and side boxes are derived respectively. The changing trends of the deployment torque of the side boxes and the torque of the torsion bars are compared, so as to conduct a dynamic analysis of the critical state of the side box deployment. This provides a certain theoretical basis for the design and calculation of the self-deploying floating body, especially for the selection of torsion bars.