基于绝对坐标与SPH方法的充气薄膜空间结构展开动力学研究

项目名称： 基于绝对坐标与SPH方法的充气薄膜空间结构展开动力学研究

项目编号： No.11302025

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 刘铖

作者单位： 北京理工大学

项目金额： 28万元

中文摘要： 以我国未来航天科技迫切需求的大尺度充气空间结构为背景，在多体系统动力学理论体系下，研究一类大型充气薄膜空间结构展开过程中所涉及的刚（刚体运动）-柔-气耦合动力学建模问题，预测此类结构与航天器本体系统整体展开动力学规律。通过开展地面实验以验证与改进理论模型及数值仿真结果，完善充气薄膜空间结构的展开动力学理论体系框架，为此类充气展开空间结构的设计、展开动力学分析等方面提供理论依据，并进一步为充气展开过程的控制研究奠定精确建模与高效求解的理论基础。主要研究内容包括：基于绝对坐标（ACB）方法与光滑粒子流体动力学（SPH）方法的充气薄膜空间结构展开动力学建模、大规模系统动力学方程的并行求解、充气薄膜空间结构―航天器本体系统整体展开动力学分析及地面实验研究。重点解决以下科学问题：大面积薄膜结构皱曲现象的高效模拟问题；充气展开中的刚―柔―气耦合多体动力学建模问题；大规模系统动力学方程并行求解问题。

中文关键词： 充气薄膜空间结构；展开动力学；绝对节点坐标方法；光滑流体动力学方法；并行计算

英文摘要： Under the framework of multibody system dynamics, this study deals with the modeling of rigid (rigid-body motion) -flexible-gas coupled dynamics mentioned in the deployment process of a kind of large-scale inflatable membrane space structures and predicts the deployment dynamics of these structures with a satellite body, in order to meet the major requirements of the nation in future space technology. The theoretical models and numerical results will be validated and amended via the ground-deployment experiments. These researches can be used to predict the theoretical framework of deployment dynamics of inflatable membrane space structures and to provide the fundamental basis for the design and application of inflatable deployment structures and so on, which also offers an accurate dynamic model and an efficient computational strategy for the control system. The major studies of the project include (1) the modeling of the deployment dynamics of inflatable membrane space structures based on Absolute Coordinate Based (ACB) method and Smoothed Particle Hydrodynamics (SPH) method, (2) the parallel solution of a huge set of dynamics equations of motion, (3) the analysis of deployment dynamics for a coupled system including a satellite body and inflatable membrane space structures, (4) the ground-deployment experiment

英文关键词： inflated membrane space structures；depolyment dyanmics；Absolute Nodal Coordinate Formulation (ANCF)；Smoothed Particle Hydrodynamics (SPH)；parallel computation