本文關(guān)鍵詞：柔性構(gòu)件大變形分析及其在柔順機(jī)構(gòu)建模中的應(yīng)用　出處：《西安電子科技大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 懸臂梁 大變形 矩量法 雙Young三穩(wěn)態(tài)機(jī)構(gòu) 優(yōu)化設(shè)計(jì)

【摘要】：柔順機(jī)構(gòu)是一種利用柔性構(gòu)件本身的彈性變形來實(shí)現(xiàn)運(yùn)動(dòng)、力、能量的傳遞和轉(zhuǎn)換的新型機(jī)構(gòu)，能夠減少零件數(shù)目、減少裝配、提高精度、減少摩擦等，在微機(jī)電系統(tǒng)、仿生領(lǐng)域有著很高的價(jià)值。 在很多情況下，柔順機(jī)構(gòu)中的柔性構(gòu)件可以簡(jiǎn)化為一根柔性的懸臂梁。本文首先介紹了懸臂梁大變形分析的幾種現(xiàn)有方法：鏈?zhǔn)剿惴�、橢圓積分法、差分方程法、偽剛體模型法，分析了它們各自的優(yōu)缺點(diǎn)，，并對(duì)比了它們求解懸臂梁大變形問題的結(jié)果。在求解柔順機(jī)構(gòu)時(shí)，鏈?zhǔn)剿惴�、橢圓積分法、差分方程法分析柔性構(gòu)件和求解機(jī)構(gòu)方程是兩個(gè)相對(duì)獨(dú)立的過程，容易引進(jìn)累計(jì)誤差造成求解的不穩(wěn)定；偽剛體模型法不存在上述問題，但是精度相對(duì)較差。本文將矩量法用在求解懸臂梁大變形分析中，其在分析懸臂梁大變形問題和求解柔順機(jī)構(gòu)問題中都具有很高的精度和穩(wěn)定性。 本文分別使用偽剛體模型法和矩量法分析了Young雙穩(wěn)態(tài)機(jī)構(gòu)，研究了此類機(jī)構(gòu)和雙Young三穩(wěn)態(tài)機(jī)構(gòu)的力矩曲線和能量曲線，借助一類特殊的有理多項(xiàng)式函數(shù)曲線和偽剛體模型建模方法，提出了一種新的優(yōu)化設(shè)計(jì)雙Young三穩(wěn)態(tài)機(jī)構(gòu)的方法，并加工出了實(shí)際機(jī)構(gòu)，驗(yàn)證了機(jī)構(gòu)的三穩(wěn)態(tài)特性，證明了方法的可行性。
[Abstract]:Compliant mechanism is a new type of mechanism which uses elastic deformation of flexible members to realize the transfer and conversion of motion, force and energy. It can reduce the number of parts, reduce assembly, improve accuracy, reduce friction and so on. In MEMS, bionic field has a high value. In many cases, the flexible member in the compliant mechanism can be simplified as a flexible cantilever beam. Firstly, this paper introduces several existing methods of large deformation analysis of the cantilever beam: chain algorithm and elliptical integration method. The difference equation method and pseudo-rigid body model method are analyzed, their advantages and disadvantages are analyzed, and their results for solving the large deformation problem of cantilever beam are compared. In solving the compliant mechanism, the chain algorithm and the elliptical integration method are used. The difference equation method is a relatively independent process for the analysis of flexible members and the solution of mechanism equations, and it is easy to introduce accumulative errors to make the solution unstable. The pseudo-rigid body model method does not exist the above problems, but the accuracy is relatively poor. In this paper, the moment method is used to solve the large deformation analysis of cantilever beam. It has high accuracy and stability in analyzing the large deformation problem of cantilever beam and solving the problem of compliant mechanism. In this paper, the pseudo-rigid body model method and the moment method are used to analyze the Young bistable mechanism, and the torque curve and the energy curve of the mechanism and the bistable Young mechanism are studied. With the help of a kind of special rational polynomial function curve and pseudo rigid body model modeling method, a new method for optimizing the design of double Young tristable mechanism is proposed, and the practical mechanism is machined. The three steady state characteristic of the mechanism is verified and the feasibility of the method is proved.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH112

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 達(dá)選祥;柔性變胞機(jī)構(gòu)研究與設(shè)計(jì)[D];西安電子科技大學(xué);2013年

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