發(fā)布時(shí)間：2018-07-29 12:30

【摘要】：本課題主要研究曲柄搖桿機(jī)構(gòu)的性能參數(shù)與機(jī)構(gòu)尺寸間的關(guān)系,繪制機(jī)械性能的相關(guān)圖譜,分析機(jī)械性能參數(shù)與機(jī)構(gòu)尺寸間的關(guān)系,總結(jié)機(jī)構(gòu)尺寸與性能參數(shù)間的一些設(shè)計(jì)規(guī)律。平面鉸鏈四桿機(jī)構(gòu)在工程實(shí)際中有廣泛的應(yīng)用,平面四桿機(jī)構(gòu)是平面多桿機(jī)構(gòu)及空間多桿機(jī)構(gòu)的基礎(chǔ),所以對(duì)平面四桿機(jī)構(gòu)的設(shè)計(jì)研究有著很重要的意義。 通過(guò)建立平面連桿機(jī)構(gòu)空間模型,用相對(duì)尺寸代替實(shí)際尺寸,從而簡(jiǎn)化尺寸類(lèi)型,建立全部平面四桿機(jī)構(gòu)的尺寸型與空間點(diǎn)位置之間的對(duì)應(yīng)關(guān)系。 用圖譜分析得出的桿件尺寸結(jié)果經(jīng)常是一個(gè)范圍,為解決實(shí)際問(wèn)題,適應(yīng)實(shí)際工作需要,使設(shè)計(jì)的連桿尺寸工作性能理想,本論文采用分析約束函數(shù),建立多目標(biāo)函數(shù)的數(shù)學(xué)模型,根據(jù)不同工況對(duì)曲柄搖桿機(jī)構(gòu)的機(jī)械性能要求的側(cè)重點(diǎn)不同,控制調(diào)節(jié)加權(quán)因子數(shù)值,使各子目標(biāo)函數(shù)的重要程度不同,來(lái)實(shí)現(xiàn)設(shè)計(jì)結(jié)果的優(yōu)化處理,得出最終設(shè)計(jì)方案。 該論文主要闡述如何繪制能對(duì)應(yīng)任意機(jī)構(gòu)尺寸的參數(shù)平面區(qū)間圖譜,研究曲柄搖桿機(jī)構(gòu)的性能參數(shù)與機(jī)構(gòu)尺寸間的關(guān)系,參數(shù)值對(duì)機(jī)構(gòu)類(lèi)型及參數(shù)合理性判定等問(wèn)題,并建立多目標(biāo)函數(shù)的數(shù)學(xué)模型來(lái)實(shí)現(xiàn)設(shè)計(jì)結(jié)果的優(yōu)化處理,使得設(shè)計(jì)人員對(duì)機(jī)構(gòu)的設(shè)計(jì)更加方便,設(shè)計(jì)結(jié)果更符合實(shí)際工作,研究結(jié)果為曲柄搖桿機(jī)構(gòu)設(shè)計(jì)提供了理論依據(jù)。
[Abstract]:This paper mainly studies the relationship between the performance parameters and the dimensions of the crank rocker mechanism, draws the related graphs of the mechanical properties, and analyzes the relationship between the mechanical performance parameters and the dimensions of the mechanism. Some design rules between mechanism size and performance parameters are summarized. The planar hinge four-bar mechanism is widely used in engineering practice. The planar four-bar mechanism is the foundation of the plane multi-bar mechanism and the spatial multi-bar mechanism, so it is of great significance to design and study the planar four-bar mechanism. By establishing the spatial model of planar linkage mechanism and replacing the actual size with relative dimension, the size type is simplified, and the corresponding relationship between the dimension type of all planar four-bar linkage and the position of space point is established. In order to solve the practical problems and meet the practical needs and make the dimension performance of the designed connecting rod ideal, this paper adopts the analytical constraint function. The mathematical model of multi-objective function is established. According to the different requirements of mechanical performance of crank and rocker mechanism under different working conditions, the value of adjusting weighting factor is controlled and the importance of each sub-objective function is different. To achieve the optimization of the design results, the final design scheme. This paper mainly expounds how to draw the interval map of parameter plane which can correspond to any size of mechanism, study the relationship between the performance parameters of crank and rocker mechanism and the dimension of mechanism, and determine the type of mechanism and the rationality of parameter by parameter value, and so on. The mathematical model of multi-objective function is established to optimize the design result, which makes the designer more convenient for the design of the mechanism, and the design result is more in line with the actual work. The research results provide the theoretical basis for the design of crank rocker mechanism.
【學(xué)位授予單位】：華北電力大學(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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