机械式可重复使用压紧释放机构的力学特性分析研究

doi:10.3901/JME.2021.01.040

机械工程学报 ›› 2021, Vol. 57 ›› Issue (1): 40-48.doi: 10.3901/JME.2021.01.040

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机械式可重复使用压紧释放机构的力学特性分析研究

秦俊杰¹, 杨帅¹, 何楠², 师志峰³, 李星¹, 赖小明¹, 莫桂冬¹

1. 北京卫星制造厂有限公司北京 100094;
2. 中国空间技术研究院北京 100094;
3. 重庆大学机械传动国家重点实验室重庆 400044

收稿日期:2019-12-26 修回日期:2020-04-27 出版日期:2021-01-05 发布日期:2021-02-06
通讯作者: 莫桂冬(通信作者),男,1982年出生。主要研究方向为宇航结构机构产品设计。E-mail:moguidong@126.com
作者简介:秦俊杰,男,1987年出生。主要研究方向为宇航结构机构产品设计。E-mail:qinjunjie529@163.com
基金资助:
国家自然科学基金资助项目（U1637208）。

Analysis of Mechanical Characteristics of a Mechanical Reusable Hold-down and Release Mechanism

QIN Junjie¹, YANG Shuai¹, HE Nan², SHI Zhifeng³, LI Xing¹, LAI Xiaoming¹, MO Guidong¹

1. Beijing Satellite Manufacturer Co., Ltd., Beijing 100094;
2. China Academy of Space Technology, Beijing 100094;
3. State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044

Received:2019-12-26 Revised:2020-04-27 Online:2021-01-05 Published:2021-02-06

摘要/Abstract

摘要： 针对发射过程中载荷需可靠锁定，在轨需解锁移动并再次锁定的需求，提出了一种载荷驱动机械式可重复使用的压紧释放机构，并对其力学特性进行了分析研究。建立了该机构的力学模型，构建了其解锁力与弹簧预紧力之间的关系；基于赫兹接触和弹塑性变形理论，提出了锁定钩—压紧脚弹塑性接触模型，分析了两者在压紧区域发生弹性变形与塑性变形的载荷区间；采用有限元方法，建立了压紧释放机构有限元模型，对其模态、正弦振动和随机振动特性进行了仿真分析，获得了该机构的振动特性及冲击载荷下的动态接触载荷。同时，开展了该机构地面系统级振动与冲击试验。仿真与试验结果表明，所设计的压紧释放机构工作可靠，具有良好的动力学特性，可应用于宇航产品高冲击需重复压紧释放的场合。

关键词: 机械式, 可重复使用, 压紧释放机构, 动力学特性

Abstract: Aiming at the requirement of reliable locking in launching process, unlocking to move and relocking on orbit of the load, a mechanical and reusable hold-down and release mechanism driven by load is proposed. The mechanical characteristics of the mechanism are analyzed. The mechanical model of the mechanism is constructed, the relationship between the unlocking force and the spring preload is established. Based on Hertz contact theory and elastic-plastic deformation theory, an elastic-plastic contact model of locking hook and hold-down foot is proposed, the load range of elastic deformation and plastic deformation of the two parts in the compression area is analyzed. The finite element model of the hold-down and release mechanism is established by using the finite element method, the modal, sinusoidal vibration and random vibration characteristics are simulated and analyzed, the vibration characteristics of the mechanism and the dynamic contact load under the impact load are obtained. At the same time, the ground system level vibration and impact tests of the mechanism are carried out. The results of simulation and test show that the designed mechanism works reliably and has good dynamic characteristics, which can be applied to the occasions of repeated compression and release of aerospace products in high impact.

Key words: mechanical, reusable, hold-down and release mechanism, dynamic characteristics

中图分类号:

TG156

秦俊杰, 杨帅, 何楠, 师志峰, 李星, 赖小明, 莫桂冬. 机械式可重复使用压紧释放机构的力学特性分析研究[J]. 机械工程学报, 2021, 57(1): 40-48.

QIN Junjie, YANG Shuai, HE Nan, SHI Zhifeng, LI Xing, LAI Xiaoming, MO Guidong. Analysis of Mechanical Characteristics of a Mechanical Reusable Hold-down and Release Mechanism[J]. Journal of Mechanical Engineering, 2021, 57(1): 40-48.

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机械式可重复使用压紧释放机构的力学特性分析研究

Analysis of Mechanical Characteristics of a Mechanical Reusable Hold-down and Release Mechanism

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