本文選題：機(jī)構(gòu)綜合 + 剪叉式Bennett機(jī)構(gòu)��； 參考：《哈爾濱工業(yè)大學(xué)》2011年碩士論文

【摘要】：論文是以一種空間過(guò)約束機(jī)構(gòu)——Bennett機(jī)構(gòu)為研究對(duì)象,通過(guò)不同的組裝方式來(lái)構(gòu)造多種空間大尺度可展網(wǎng)絡(luò),以滿(mǎn)足其在航空航天、土木工程以及玩具工業(yè)等相關(guān)領(lǐng)域的特殊需求。 考慮到含單自由度運(yùn)動(dòng)副機(jī)構(gòu)尤其是只含有轉(zhuǎn)動(dòng)副的機(jī)構(gòu)相比其它機(jī)構(gòu)的可靠性和穩(wěn)定性更高,因此論文對(duì)含有單自由度副即轉(zhuǎn)動(dòng)副、移動(dòng)副和螺旋副的運(yùn)動(dòng)鏈進(jìn)行機(jī)構(gòu)綜合。以螺旋理論為基礎(chǔ),通過(guò)李群的概念來(lái)描述機(jī)構(gòu)的運(yùn)動(dòng),對(duì)運(yùn)動(dòng)鏈的自由度以及可行性運(yùn)動(dòng)進(jìn)行機(jī)構(gòu)綜合,并且完成機(jī)構(gòu)綜合列表。 論文的主體部分是確定以含有最少轉(zhuǎn)動(dòng)副的單閉環(huán)機(jī)構(gòu)--Bennett機(jī)構(gòu)為基本單元進(jìn)行大尺度可展機(jī)構(gòu)或者網(wǎng)絡(luò)的組裝。首先在Bennett機(jī)構(gòu)的基礎(chǔ)上進(jìn)行創(chuàng)新性設(shè)計(jì)得到剪叉式Bennett機(jī)構(gòu),然后論文以剪叉式Bennett機(jī)構(gòu)為基本單元完成了平面可展網(wǎng)絡(luò)的組裝,接著分別用Bennett機(jī)構(gòu)和剪叉式Bennett機(jī)構(gòu)為基本單元構(gòu)建了不同的基本模塊,繼而通過(guò)基本模塊完成了不同空間可展機(jī)構(gòu)或者網(wǎng)絡(luò)的組裝。 然后通過(guò)D-H參數(shù)法對(duì)Bennett機(jī)構(gòu)進(jìn)行了運(yùn)動(dòng)學(xué)分析,以此為基礎(chǔ)完成了對(duì)平面可展網(wǎng)絡(luò)和基于單自由度模塊的可展網(wǎng)絡(luò)的運(yùn)動(dòng)學(xué)分析,并通過(guò)ADMAS仿真軟件進(jìn)行運(yùn)動(dòng)學(xué)仿真。最后對(duì)空間大尺度可展網(wǎng)絡(luò)的剛化鎖定進(jìn)行研究。在約束條件一定的前提下,對(duì)剛化繩索布置方式進(jìn)行了研究,利用APDL語(yǔ)言對(duì)剛化后的結(jié)構(gòu)建立相應(yīng)的等效模型并進(jìn)行參數(shù)優(yōu)化以及模態(tài)分析。
[Abstract]:In this paper, a kind of space over-constrained mechanism, Bennett mechanism, is used to construct a variety of large scale deployable networks in order to meet the requirements of aerospace applications. Special needs in related fields such as civil engineering and toy industry. Considering that the mechanism with single degree of freedom, especially the mechanism with only rotating pair, is more reliable and stable than other mechanisms, this paper synthesizes the kinematic chain with single degree of freedom, that is, rotating pair, moving pair and spiral pair. Based on the helical theory, the motion of the mechanism is described by the concept of Li Qun, the degree of freedom of the kinematic chain and the feasible motion are synthesized, and the comprehensive list of the mechanism is completed. The main part of this paper is to determine the large scale deployable mechanism or network assembly based on the single closed loop mechanism with the least rotating pair, Bennett mechanism as the basic unit. Firstly, the shear fork Bennett mechanism is designed on the basis of the Bennett mechanism, and then the planar developable network is assembled with the shear Bennett mechanism as the basic element. Then different basic modules are constructed by using Bennett mechanism and shear-fork Bennett mechanism respectively, and then different spatial deployable mechanisms or networks are assembled by basic modules. Then the kinematics analysis of Bennett mechanism is carried out by D-H parameter method. Based on this, the kinematics analysis of planar deployable network and developable network based on single degree of freedom module is completed, and the kinematics simulation is carried out by ADMAS simulation software. Finally, the rigid locking of large scale developable space network is studied. On the premise of certain constraint conditions, the arrangement of stiffened rope is studied. The equivalent model of the stiffened structure is established by using APDL language, and the parameter optimization and modal analysis are carried out.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類(lèi)號(hào)】：TH112

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