| 基于拉力带的系列新型SST-LEJ设计与分析 |
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| 引用本文： | 邱丽芳, 吴友炜, 冷迎春, 王晶琳. 基于拉力带的系列新型SST-LEJ设计与分析[J]. 工程科学学报, 2018, 40(10): 1267-1274. DOI: 10.13374/j.issn2095-9389.2018.10.015 |
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| 作者姓名： | 邱丽芳 吴友炜 冷迎春 王晶琳 |
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| 作者单位： | 1.北京科技大学机械工程学院, 北京 100083 |
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| 基金项目： | 国家自然科学基金资助项目(51475037) |
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| 摘 要： | 设计了一种基于大柔度的柔性铰链,命名为SS-LEJ,利用等效法推导了其弯曲等效刚度的理论计算公式,通过设计实例的理论计算和ABAQUS仿真分析,验证理论计算公式的正确性.为了有效提升SS-LEJ的抗拉压性能,设计了4种不同位置和形状的拉力带的SST-LEJ,通过弯曲性能和抗拉压性能的有限元仿真分析,得出SST3-LEJ和SST4-LEJ为4种SST-LEJ当中整体性能较优的两种.将SST3-LEJ和SST4-LEJ与SS-LEJ、Inverted Bending-Orthogonal铰链进行了弯曲性能和抗拉压性能的比较,得出SST3-LEJ和SST4-LEJ的弯曲性能介于SS-LEJ和Inverted Bending-Orthogonal铰链之间,抗拉压性能优于SS-LEJ和Inverted Bending-Orthogonal铰链,说明SST3-LEJ和SST4-LEJ的整体性能较好,达到了预期的设计目的,为大柔度柔性铰链的设计提供了一种思路.
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| 关 键 词： | 柔性铰链 弯曲等效刚度 有限元分析 拉力带 弯曲性能 抗拉压性能 |
| 收稿时间： | 2017-09-15 |
Design and analysis of a series of new SST-LEJ based on tension straps |
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| QIU Li-fang, WU You-wei, LENG Ying-chun, WANG Jing-lin. Design and analysis of a series of new SST-LEJ based on tension straps[J]. Chinese Journal of Engineering, 2018, 40(10): 1267-1274. DOI: 10.13374/j.issn2095-9389.2018.10.015 |
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| Authors: | QIU Li-fang WU You-wei LENG Ying-chun WANG Jing-lin |
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| Affiliation: | 1.School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | Lamina emergent mechanisms that can realize out-of-plane motion are a kind of compliant mechanisms. They mainly transmit motion, force, and energy through flexible joints; therefore, the design of flexible joints is very important. In the design of flexible joints, the primary requirements are the bending performance and the tensile and compressive properties. However, in general, with the improvement of the bending performance of flexible joints, the tensile and compressive properties deteriorate, and the overall performance of the joints is unable to meet the requirements. To realize joints with better overall performance, tension straps of flexible joints were designed in this study. Based on a flexible joint with high flexibility, a new flexible joint named SS-LEJ was designed. According to the equivalent method, the joint's equivalent spring model was created, and the equations needed to calculate the bending equivalent stiffness of the joints were deduced. In addition, a finite element analysis model was created. The equations were verified by theoretical calculations and ABAQUS simulation analysis. The theoretical calculation and ABAQUS simulation analysis results agree very well. To improve the tensile and compressive properties of SS-LEJ, four kinds of tension straps in different positions and shapes of SST-LEJ were designed. Stress analysis was performed, and the finite element analysis results show that SST3-LEJ and SST4-LEJ are the best two kinds of SST-LEJ. The bending performances and the tensile and compressive properties of SST3-LEJ, SST4-LEJ, SS-LEJ, and inverted bending-orthogonal (IBO) joint were compared. The results show that the bending performances of SST3-LEJ and SST4-LEJ are between those of SS-LEJ and IBO joint, and the tensile and compressive properties of SST3-LEJ and SST4-LEJ are better than those of SS-LEJ and IBO joint. This indicates that the overall performances of SST3-LEJ and SST4-LEJ are better, and the design goal is achieved, which provides an effective method for the design of flexible joints. |
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| Keywords: | flexible joint bending equivalent stiffness finite element analysis tension straps bending performance tensile and compressive properties |
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