發(fā)布時間：2018-06-14 06:43

  本文選題：電梯 + 轎架��； 參考：《天津大學(xué)》2015年碩士論文

【摘要】：面對市場需求的多樣性和市場競爭的日趨激烈,電梯企業(yè)對其產(chǎn)品覆蓋范圍、開發(fā)周期和成本都提出了更高的要求。企業(yè)在提高產(chǎn)品設(shè)計效率、減少重復(fù)性工作的同時,還要兼顧產(chǎn)品質(zhì)量和產(chǎn)品結(jié)構(gòu)的安全,以保證電梯高效、安全、可靠的運行。顯然,傳統(tǒng)的設(shè)計方法是達(dá)不到電梯行業(yè)發(fā)展速度的,市場需求的快速發(fā)展急需設(shè)計方法的改進(jìn)。參數(shù)化設(shè)計方法作為一種全新的設(shè)計方法,利用其對產(chǎn)品進(jìn)行設(shè)計建模、有限元分析及優(yōu)化,在產(chǎn)品系列化設(shè)計、相似性設(shè)計及優(yōu)化設(shè)計方面具有較大的應(yīng)用價值;還可以縮短產(chǎn)品的設(shè)計開發(fā)周期,降低產(chǎn)品成本,提高企業(yè)的生產(chǎn)效率和競爭力,具有重要的社會意義和經(jīng)濟(jì)意義。本課題以電梯轎架為研究對象,以Creo和ANSYS Workbench為工具,首先研究基于Top-Down的電梯轎架參數(shù)化建模方法,通過布局設(shè)計、初定產(chǎn)品結(jié)構(gòu)、骨架模型實現(xiàn)設(shè)計信息的一致性傳遞,最終得到可利用全局關(guān)鍵參數(shù)驅(qū)動整體模型再生更新的轎架參數(shù)化模型;在此基礎(chǔ)上創(chuàng)建有限元模型,在網(wǎng)格劃分、約束和加載的基礎(chǔ)上進(jìn)行結(jié)構(gòu)靜力學(xué)分析,校驗了結(jié)構(gòu)的安全可靠性以及后續(xù)進(jìn)行優(yōu)化設(shè)計的必要性。本課題提出了電梯轎架參數(shù)優(yōu)化設(shè)計的新思路:以側(cè)梁為例,依據(jù)優(yōu)化設(shè)計、遺傳算法和實驗設(shè)計的相關(guān)理論,以側(cè)梁截面尺寸和厚度為設(shè)計變量,以側(cè)梁最大等效應(yīng)力和側(cè)梁質(zhì)量為目標(biāo)函數(shù),研究側(cè)梁截面尺寸的優(yōu)化方法。優(yōu)化后的側(cè)梁最大等效應(yīng)力由186.27MPa降低到168.87MPa,降低了12.35%,質(zhì)量由20.27kg降低到17.767Kg,降低了9.34%。在此基礎(chǔ)上,進(jìn)一步以側(cè)梁厚度和高度為設(shè)計變量,通過參數(shù)靈敏度分析,確定出對等效應(yīng)力不敏感但對重量敏感的3個設(shè)計變量,并根據(jù)響應(yīng)曲線,分析設(shè)計變量和目標(biāo)函數(shù)的變化規(guī)律。通過對側(cè)梁的優(yōu)化設(shè)計,實現(xiàn)了側(cè)梁的輕量化,降低了生產(chǎn)成本,使側(cè)梁結(jié)構(gòu)更加趨于合理,并為電梯其他結(jié)構(gòu)部件的優(yōu)化設(shè)計提供了參考和借鑒。
[Abstract]:Facing the diversity of market demand and the increasingly fierce market competition, elevator enterprises put forward higher requirements for their product coverage, development cycle and cost. The enterprise not only improves the efficiency of product design and reduces the repetitive work, but also takes into account the safety of product quality and product structure in order to ensure the efficient, safe and reliable operation of elevators. Obviously, the traditional design method is not able to achieve the speed of elevator industry development, the rapid development of market demand needs to improve the design method. As a new design method, parameterized design method has great application value in product serialization design, similarity design and optimization design because of its design modeling, finite element analysis and optimization. It can also shorten the design and development cycle of products, reduce the cost of products, improve the production efficiency and competitiveness of enterprises, which has important social and economic significance. This subject takes the elevator frame as the research object, takes Creo and ANSYS Workbench as the tool, studies the parametric modeling method of the elevator frame based on Top-Down, realizes the consistent transfer of the design information through the layout design, the initial product structure and the skeleton model. Finally, the parameterized model of the car frame can be regenerated by using the global key parameters to drive the whole model, and then the finite element model is created, and the statics analysis of the structure is carried out on the basis of meshing, constraint and loading. The safety and reliability of the structure and the necessity of optimization design are verified. In this paper, a new idea of optimal design of elevator frame parameters is put forward. Taking the side beam as an example, according to the theory of optimization design, genetic algorithm and experimental design, the cross section size and thickness of side beam are taken as design variables. Taking the maximum equivalent stress and the mass of the lateral beam as the objective function, the optimization method of the cross-section size of the lateral beam is studied. The maximum equivalent stress of the optimized side beam is reduced from 186.27 MPA to 168.87 MPA, and the mass is reduced from 20.27kg to 17.767 kg / g, and the mass is reduced from 9.34 to 17.767 kg / g, and the maximum equivalent stress is reduced from 186.27 MPA to 168.87 MPA. On this basis, taking the thickness and height of the side beam as design variables, three design variables which are not sensitive to equivalent stress but sensitive to weight are determined by parameter sensitivity analysis, and according to the response curve, The variation of design variables and objective functions is analyzed. Through the optimization design of the side beam, the light weight of the side beam is realized, the production cost is reduced, the side beam structure is more reasonable, and the reference and reference are provided for the optimization design of other structural parts of elevator.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU857

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本文編號：2016511