發(fā)布時間：2018-03-20 02:03

  本文選題：沖擊　切入點：超彈性鉸鏈　出處：《振動與沖擊》2016年09期 　論文類型：期刊論文

【摘要】：超彈性鉸鏈依靠自身大撓度彈性折疊存儲的彈性勢能實現(xiàn)彈性展開,集驅(qū)動、旋轉(zhuǎn)和鎖定于一體。研究了雙層超彈性鉸鏈展開沖擊性能,提出了降低雙層超彈性鉸鏈展開沖擊優(yōu)化方法。為了確保有限元模型的準確性,搭建實驗平臺對雙層超彈性鉸鏈進行動力學展開性能測試,基于實驗結(jié)果對有限元模型進行修正。采用正交法試驗設(shè)計建立展開沖擊特性代理模型。以展開沖擊角度和鎖定時間最小為目標函數(shù),采用改進的非支配遺傳算法對雙層超彈性鉸鏈進行參數(shù)化優(yōu)化設(shè)計,得到最優(yōu)結(jié)構(gòu)尺寸。對最優(yōu)結(jié)構(gòu)尺寸進行有限元展開分析,誤差不大于5.008%,表明代理模型準確性。最優(yōu)非等厚度與等厚度雙層超彈性鉸鏈對比,發(fā)現(xiàn)前者沖擊角度和鎖定時間分別降低52.154%和29.104%,優(yōu)化后結(jié)構(gòu)的沖擊得到明顯改善。通過參數(shù)研究發(fā)現(xiàn),展開沖擊對外側(cè)帶簧厚度較為敏感,鎖定時間隨帶簧厚度增加表現(xiàn)出先減少后增大的趨勢。
[Abstract]:Hyperelastic hinge realizes elastic expansion by using elastic potential energy stored in its own large deflection elastic folding, which is driven, rotated and locked in one body. The impact performance of double layer hyperelastic hinge is studied. In order to ensure the accuracy of the finite element model, an experimental platform was built to test the dynamic expansion performance of the double layer hyperelastic hinge. Based on the experimental results, the finite element model is modified, and the agent model of expanded impact characteristics is established by orthogonal test design. The objective function is to minimize the impact angle and locking time. An improved non-dominated genetic algorithm is used to optimize the parametric design of double-layer hyperelastic hinge, and the optimal structure size is obtained. The finite element analysis of the optimal structure size is carried out. The error is not greater than 5.008, which indicates the accuracy of the agent model. The optimum non-equal thickness and equal thickness double-layer hyperelastic hinge are compared. It is found that the impact angle and locking time of the former are reduced by 52.154% and 29.104, respectively, and the impact of the optimized structure is obviously improved. Through the parameter study, it is found that the expanded impact is more sensitive to the thickness of the outer band spring. The increase of spring thickness with locking time shows a tendency of first decreasing and then increasing.
【作者單位】： 哈爾濱工業(yè)大學機電學院機器人技術(shù)與系統(tǒng)國家實驗室;
【基金】：國家高校111計劃(B07018) 機器人技術(shù)與系統(tǒng)國家實驗室自主課題(SKLRS201401A02) 中央高校基礎(chǔ)研究基金(HIT.NSRIF.2015050)
【分類號】：V414

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