基于ALE-ANCF方法的卷曲展开机构动力学建模与分析

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振动与冲击 ›› 2025, Vol. 44 ›› Issue (2) : 131-142.

航空航天

基于ALE-ANCF方法的卷曲展开机构动力学建模与分析

黄斐1，袁婷婷2，刘锦阳*1

作者信息 +

Deployment dynamics modelling and analysis of a rolled deployable mechanism based on the ALE-ANCF method

HUANG Fei1，YUAN Tingting2，LIU Jinyang*1

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文章历史 +

摘要

针对含复杂的多区域接触的卷曲展开机构，本文将其简化为带刚性转盘的变长度柔性构件，建立多体系统动力学模型，以实现高效仿真。首先基于任意拉格朗日-欧拉描述的绝对节点坐标法（ALE-ANCF）对变长度梁进行建模，然后将复杂接触问题简化为移动边界的约束关系,给出一种增删节点处理方法，有效解决了单元长度变化引起的奇异和精度问题，在此基础上建立了刚-柔耦合多体系统的动力学模型，用隐式算法实现了动力学方程的数值求解。通过滑绳和动滑轮算例验证了建模方法的有效性。最后建立了卷曲机构充气展开系统的简化动力学模型，该模型采用任意拉格朗日-欧拉移动网格实时跟踪卷曲机构的位置，精准捕捉移动边界点，从而高效确定接触行为。分析了气压力与黏附力对展开动力学特性的影响，通过控制黏附力分布，实现了卷曲机构的匀速展开，对工程实际具有参考价值。

Abstract

In this paper, the crimped expansion mechanism with complex multi-region contact is simplified to a variable-length flexible component attached with a rigid disk, and the multi-body system dynamics model is established to realize efficient simulation. Firstly, a variable-length beam is modeled using the absolute nodal coordinate formulation described by arbitrary Lagrangian–Eulerian method (ALE-ANCF), and then the complex contact problem is simplified into constraint relation of moving boundary. A method for adding and deleting nodes is presented which can effectively solve the singularity and accuracy problems caused by the change of element length. On this basis, rigid-flexible coupling dynamic model for the multibody system is established, and the numerical solution of the dynamic equations is realized by an implicit algorithm. The effectiveness of the modeling method is verified by examples of sliding rope and moving pulley. Finally, a simplified dynamic model of the rolled deployable mechanism inflatable deployment system is developed, in which arbitrary Lagrangian-Eulerian moving mesh is used to track the real-time position of the rolled deployable mechanism, accurately capture the moving boundary points, and quickly determine the contact behavior. The influence of air pressure and adhesion force on the development dynamic characteristics is analyzed. By controlling the distribution of adhesion force, the uniform deployment of the rolled deployable mechanism is achieved, which holds practical engineering significance.

导出引用

黄斐1, 袁婷婷2, 刘锦阳1. 基于ALE-ANCF方法的卷曲展开机构动力学建模与分析[J]. 振动与冲击, 2025, 44(2): 131-142

HUANG Fei1, YUAN Tingting2, LIU Jinyang1. Deployment dynamics modelling and analysis of a rolled deployable mechanism based on the ALE-ANCF method[J]. Journal of Vibration and Shock, 2025, 44(2): 131-142

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