【摘要】：連桿變幅機(jī)構(gòu)在高空作業(yè)車(chē)上的應(yīng)用,形式新穎,不僅可增加作業(yè)幅度,還可改善變幅油缸工作條件,降低變幅油缸的最大受力和降低變幅油缸液壓沖擊。因此對(duì)連桿變幅機(jī)構(gòu)進(jìn)行優(yōu)化分析具有重要的意義。 本文以大連理工大學(xué)與某公司合作研發(fā)的26米高空作業(yè)車(chē)實(shí)際項(xiàng)目為背景,基于MATLAB數(shù)值計(jì)算能力和遺傳算法優(yōu)化工具箱技術(shù),結(jié)合虛擬樣機(jī)技術(shù)對(duì)高空作業(yè)車(chē)連桿變幅機(jī)構(gòu)的鉸點(diǎn)位置進(jìn)行分析研究。主要完成以下內(nèi)容： (1)分析高空作業(yè)車(chē)連桿變幅機(jī)構(gòu)的工作原理,初步選取變幅機(jī)構(gòu)鉸點(diǎn)位置,建立變幅機(jī)構(gòu)的數(shù)學(xué)模型并編寫(xiě)了數(shù)學(xué)模型的計(jì)算程序。根據(jù)高空作業(yè)車(chē)的不限幅作業(yè)工況,分析變幅油缸和變幅機(jī)構(gòu)鉸點(diǎn)的受力特點(diǎn)。根據(jù)受力特點(diǎn)確定了變幅油缸受力最大時(shí)對(duì)應(yīng)的變幅機(jī)構(gòu)最惡劣工況。 (2)以連桿變幅機(jī)構(gòu)鉸點(diǎn)位置坐標(biāo)為設(shè)計(jì)變量,以降低變幅油缸受力最大值為目標(biāo)函數(shù),在變幅油缸受力最惡劣工況下建立優(yōu)化模型,結(jié)合MATLAB遺傳算法優(yōu)化工具箱技術(shù)和遺傳算法容易獲取全局最優(yōu)解的特點(diǎn),在最惡劣工況下對(duì)優(yōu)化模型進(jìn)行優(yōu)化分析。 (3)基于Pro/E三維建模能力和ADAMS動(dòng)態(tài)仿真技術(shù),建立連桿變幅機(jī)構(gòu)的虛擬樣機(jī)模型。對(duì)比分析虛擬樣機(jī)模型的動(dòng)力學(xué)仿真結(jié)果與優(yōu)化模型的數(shù)值計(jì)算結(jié)果,驗(yàn)證初選鉸點(diǎn)位置的合理性及數(shù)學(xué)模型的正確性。
[Abstract]:The application of connecting rod luffing mechanism in high altitude working vehicle is novel. It can not only increase the working amplitude, but also improve the working conditions of the variable amplitude cylinder, reduce the maximum force of the variable amplitude cylinder and reduce the hydraulic shock of the variable amplitude cylinder. Therefore, it is of great significance to optimize the linkage luffing mechanism. Based on the actual project of 26m aerial vehicle developed by Dalian University of Technology and a company, this paper is based on the MATLAB numerical computing ability and genetic algorithm optimization toolbox technology. Combined with virtual prototyping technology, the hinge position of connecting rod luffing mechanism of aerial working vehicle is analyzed and studied. The main contents are as follows: (1) analyzing the working principle of the linkage luffing mechanism of the aerial working car, selecting the hinge position of the luffing mechanism, establishing the mathematical model of the luffing mechanism and compiling the calculation program of the mathematical model. According to the operating condition of the aerial working vehicle, the stress characteristics of the cylinder and the hinge of the luffing mechanism are analyzed. According to the stress characteristics, the worst working conditions of the luffing mechanism corresponding to the maximum force are determined. (2) taking the position coordinate of the hinge point of the linkage luffing mechanism as the design variable, and taking the maximum force of the variable amplitude cylinder as the objective function, The optimization model is established under the worst load condition of the variable amplitude cylinder, and combined with the MATLAB genetic algorithm optimization toolbox technology and genetic algorithm, it is easy to obtain the global optimal solution. The optimization model is optimized under the worst working conditions. (3) based on the 3D modeling ability of Pro/E and the ADAMS dynamic simulation technology, the virtual prototype model of the linkage luffing mechanism is established. The dynamic simulation results of the virtual prototype model and the numerical results of the optimization model are compared to verify the rationality of the primary hinge location and the correctness of the mathematical model.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH21

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 劉仁華;多功能破拆消防車(chē)臂架動(dòng)力學(xué)分析[D];大連理工大學(xué);2013年

，

本文編號(hào)：2284523