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基于特征參數(shù)的DCA-LET結(jié)構(gòu)設(shè)計(jì)與性能分析
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國(guó)家自然科學(xué)基金項(xiàng)目(51475037)


Structure Design and Performance Analysis of DCA-LET Based on Characteristic Parameters
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    摘要:

    設(shè)計(jì)了一種基于雙C型結(jié)構(gòu)的柔性鉸鏈,稱為DCA-LET柔性鉸鏈。定義了影響該柔性鉸鏈性能的特征參數(shù),通過對(duì)8組不同特征參數(shù)實(shí)例的仿真分析,擬合了特征參數(shù)與等效彈簧剛度之間的關(guān)系,推導(dǎo)了基于該鉸鏈特征參數(shù)的等效彈簧剛度的理論計(jì)算公式并且引入了修正系數(shù)。通過3組實(shí)例的理論計(jì)算和有限元仿真分析,驗(yàn)證了理論計(jì)算公式以及修正系數(shù)的正確性。通過對(duì)比3組不同特征參數(shù)的DCA-LET柔性鉸鏈與內(nèi)LET柔性鉸鏈的彎曲性能與抗拉性能,得出控制特征參數(shù)能夠控制該柔性鉸鏈的彎曲性能,同時(shí)保證其抗拉壓性能并沒有明顯下降。

    Abstract:

    LEMs achieve the movement and force transmission through flexure hinges, so it is very important to design flexure hinges. A new type of flexure hinge based on double C-type structure was proposed, named as DCA-LET flexure hinge. The characteristic parameters influencing the performance of the flexure hinge were defined. Based on the simulation analysis of eight examples of different characteristic parameters, the fitting curve of the relationship between the characteristic parameters and the simulation values of the equivalent stiffness was obtained. The theoretical formula of equivalent spring stiffness based on the characteristic parameters of the hinge was deduced and the correction factor was introduced. The correctness of theoretical calculation formula and correction factor was verified by theoretical calculation and finite element simulation of three examples. The bending and tensile properties of three DCA-LET flexure hinges with different characteristic parameters and inside LET flexure hinge were compared, and the results showed that the DCA-LET flexure hinge had better overall performance than the LET flexure hinge. The characteristic parameters can control the bending performance of DCA-LET hinge, and its tensile and compression properties had no significant decrease, which provided an effective method for the design of the flexure hinges.

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邱麗芳,黃鋼,陳海翔.基于特征參數(shù)的DCA-LET結(jié)構(gòu)設(shè)計(jì)與性能分析[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2017,48(8):399-404. QIU Lifang, HUANG Gang, CHEN Haixiang. Structure Design and Performance Analysis of DCA-LET Based on Characteristic Parameters[J]. Transactions of the Chinese Society for Agricultural Machinery,2017,48(8):399-404.

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  • 收稿日期:2017-01-14
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  • 在線發(fā)布日期: 2017-08-10
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