[1]姜东,徐宇,王桂伦,等.锁定状态下球铰连接桁架的刚度性能[J].东南大学学报(自然科学版),2019,49(5):820-825.[doi:10.3969/j.issn.1001-0505.2019.05.002]
 Jiang Dong,Xu Yu,Wang Guilun,et al.Stiffness property of locked truss with spherical hinge connection[J].Journal of Southeast University (Natural Science Edition),2019,49(5):820-825.[doi:10.3969/j.issn.1001-0505.2019.05.002]
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锁定状态下球铰连接桁架的刚度性能()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
49
期数:
2019年第5期
页码:
820-825
栏目:
机械工程
出版日期:
2019-09-20

文章信息/Info

Title:
Stiffness property of locked truss with spherical hinge connection
作者:
姜东12徐宇1王桂伦2周李真辉2费庆国2
1南京林业大学机械电子工程学院, 南京 210037; 2东南大学空天机械动力学研究所, 南京 211189
Author(s):
Jiang Dong12 Xu Yu1 Wang Guilun2 Zhou Lizhenhui2 Fei Qingguo2
1School of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing 210037, China
2Institute of Aerospace Machinery and Dynamics, Southeast University, Nanjing 211189, China
关键词:
可展开结构 锁定状态 接触分析 刚度分析 等效建模
Keywords:
deployable mast locked status contact analysis stiffness analysis equivalent modeling
分类号:
TH113;O327
DOI:
10.3969/j.issn.1001-0505.2019.05.002
摘要:
采用理论分析、接触有限元和试验方法研究了球铰连接可展开桁架的刚度性能.首先,基于能量原理得到桁架结构的x、y方向等效刚度;对于z方向压缩刚度,竖杆两端球铰与角节点接触无法忽略,运用Winkler弹性地基理论得到球铰连接的等效接触刚度,并进一步根据弹簧串联原理进行求解.然后,考虑球铰接触状态,采用接触有限元进行刚度分析,将接触体和目标体都设置为变形体,通过周期性位移边界条件加载得到展开单元xyz三个方向的刚度.最后,通过试验来验证接触分析方法的准确性.结果表明,接触有限元方法可准确预测球铰连接桁架的刚度,结构z方向的压缩刚度远小于x、y方向的刚度值.
Abstract:
The stiffness of a deployable truss structure with spherical hinge connection was analyzed by theoretical analysis, contact finite element method and experimental method. First, the equivalent stiffness in the x,y direction of the truss structure was obtained based on the energy principle. For the compression stiffness in the z direction, the contact between the spherical hinge and the corner node cannot be neglected, and the Winkler elastic foundation theory was utilized to obtain the equivalent stiffness of the spherical hinge connection. The equivalent z axial stiffness of the structure was calculated according to the spring series theory. Then, considering the contact state, the contact finite element modeling was used for stiffness analysis.The contact object and the target body were assumed to be deformable. The stiffness of the structure in the x,y,z direction were obtained by applying periodic boundary condition. Finally, the experimental tests were conducted to verify the accuracy of the contact finite element method.The results show that the contact finite element method can be applied to predict the stiffness properties of the structure with spherical hinge. The compression stiffness of the structure in the z direction is less than those in the x and y directions.

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备注/Memo

备注/Memo:
收稿日期: 2019-02-04.
作者简介: 姜东(1985—),男,博士, 讲师, jiangdong@njfu.edu.cn.
基金项目: 国家自然科学基金资助项目(11602112).
引用本文: 姜东,徐宇,王桂伦,等.锁定状态下球铰连接桁架的刚度性能[J].东南大学学报(自然科学版),2019,49(5):820-825. DOI:10.3969/j.issn.1001-0505.2019.05.002.
更新日期/Last Update: 2019-09-20