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  本文選題：壓裂車車架 + 多目標拓撲優(yōu)化��； 參考：《大連理工大學》2015年碩士論文

【摘要】：壓裂車作為油田壓裂關(guān)鍵設(shè)備,用來執(zhí)行高壓大排量油田增產(chǎn)作業(yè)。壓裂車車載設(shè)備重量較大,行駛路況較差,壓裂過程中壓裂泵產(chǎn)生沖擊載荷較大。車架作為主要承載部件,既要承受彎曲、扭轉(zhuǎn)等多種載荷及路面不平引起的振動,又要承受壓裂作業(yè)時壓裂泵產(chǎn)生的沖擊載荷,應(yīng)當具備足夠剛、強度以及良好的動態(tài)性能以保證整車安全性與穩(wěn)定性。本文以壓裂車車架為研究對象,基于結(jié)構(gòu)優(yōu)化設(shè)計理論和方法,進行結(jié)構(gòu)拓撲優(yōu)化、尺寸優(yōu)化設(shè)計及性能分析,同時開發(fā)車架結(jié)構(gòu)優(yōu)化設(shè)計系統(tǒng),實現(xiàn)車架設(shè)計流程的智能化。根據(jù)車架結(jié)構(gòu)設(shè)計要求,綜合考慮靜態(tài)多工況剛度和低階固有頻率,基于SIMP變密度法對車架進行多目標拓撲優(yōu)化設(shè)計。采用帶權(quán)重的折衷規(guī)劃法定義多工況剛度拓撲優(yōu)化目標函數(shù),平均頻率公式定義動態(tài)頻率優(yōu)化目標,建立車架結(jié)構(gòu)多目標拓撲優(yōu)化數(shù)學模型,優(yōu)化后獲得兼顧結(jié)構(gòu)剛度和動態(tài)特性要求的車架最優(yōu)拓撲結(jié)構(gòu)。并基于拓撲優(yōu)化計算結(jié)果對車架結(jié)構(gòu)方案進行初步設(shè)計。在結(jié)構(gòu)拓撲布局及初始方案設(shè)計的基礎(chǔ)上,基于ANSYS參數(shù)化設(shè)計方法對車架結(jié)構(gòu)尺寸參數(shù)進行優(yōu)化設(shè)計。建立尺寸優(yōu)化設(shè)計模型,根據(jù)靈敏度分析計算結(jié)果選取對車架結(jié)構(gòu)性能影響較大的參數(shù)為尺寸優(yōu)化設(shè)計變量,利用ANSYS軟件提供的零階優(yōu)化方法獲取最優(yōu)解的基本位置,經(jīng)過一階優(yōu)化得到精確解,結(jié)構(gòu)性能對比分析表明優(yōu)化后車架性能得到很大改善。為避免大量重復性工作,提高設(shè)計效率,對壓裂車車架結(jié)構(gòu)優(yōu)化設(shè)計流程進行標準化,基于Visual Basic軟件開發(fā)平臺開發(fā)車架結(jié)構(gòu)優(yōu)化設(shè)計系統(tǒng)。對HyperMesh進行二次開發(fā)實現(xiàn)拓撲優(yōu)化設(shè)計流程的自動化,基于APDL語言通過后臺調(diào)用ANSYS實現(xiàn)車架結(jié)構(gòu)尺寸參數(shù)化設(shè)計及有限元分析。實例應(yīng)用表明該系統(tǒng)操作簡單方便、可重復性好,能夠?qū)崿F(xiàn)車架結(jié)構(gòu)優(yōu)化快速設(shè)計,為實現(xiàn)同類產(chǎn)品參數(shù)化設(shè)計提供參考依據(jù)。分析計算結(jié)果表明優(yōu)化后車架結(jié)構(gòu)性能更好,承載能力得到提高,本文研究內(nèi)容為車架結(jié)構(gòu)優(yōu)化設(shè)計提供了一種行之有效的方法。
[Abstract]:As the key equipment of oil field fracturing, fracturing truck is used to increase production of high pressure and large displacement oilfield. The loading load of fracturing pump during fracturing process is large because of its heavy weight and poor driving condition. As the main bearing parts, the frame should not only bear the vibration caused by bending and torsion and uneven road surface, but also bear the impact load caused by fracturing pump, so it should be rigid enough. Strength and good dynamic performance to ensure vehicle safety and stability. Based on the theory and method of structural optimization design, the structure topology optimization, dimension optimization design and performance analysis are carried out in this paper. At the same time, the frame structure optimization design system is developed to realize the intelligentization of the frame design flow. According to the requirements of frame structure design, the multi-objective topology optimization design of frame is carried out based on SIMP variable density method, considering the static multi-condition stiffness and low-order natural frequency. The objective function of multi-condition stiffness topology optimization is defined by the tradeoff programming method with weight, the dynamic frequency optimization objective is defined by the average frequency formula, and the mathematical model of multi-objective topology optimization of frame structure is established. After optimization, the optimal topology of the frame is obtained, which takes account of both the stiffness and the dynamic characteristics of the frame. Based on the results of topology optimization, the scheme of frame structure is preliminarily designed. Based on the structural topology layout and initial scheme design, the structural dimension parameters of the frame are optimized based on ANSYS parametric design method. The dimension optimization design model is established. According to the results of sensitivity analysis, the parameters which have a great influence on the performance of the frame are selected as the dimension optimization design variables, and the basic position of the optimal solution is obtained by using the zero order optimization method provided by ANSYS software. After the first order optimization, the exact solution is obtained, and the comparative analysis of the structure performance shows that the performance of the frame is greatly improved after the optimization. In order to avoid a lot of repetitive work and improve design efficiency, the optimization design system of frame structure is developed based on Visual basic software development platform. HyperMesh is redeveloped to realize the automation of topology optimization design process. Based on APDL language, the parameterized design and finite element analysis of frame structure size are realized by calling ANSYS in the background. The practical application shows that the system is easy to operate and repeatable. It can realize the optimization and rapid design of the frame structure and provide the reference for the parameterized design of the similar products. The results of analysis and calculation show that the performance of the frame structure is better and the bearing capacity is improved after the optimization. The research content of this paper provides an effective method for the optimization design of the frame structure.
【學位授予單位】：大連理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE934.2

【參考文獻】

相關(guān)期刊論文 前5條

1 王欣;黃琳;高媛;高順德;王益華;;起重機伸縮臂截面拓撲優(yōu)化[J];大連理工大學學報;2009年03期

2 孫營,王澤斌;靈敏度方法在汽車設(shè)計中的應(yīng)用[J];湖北汽車工業(yè)學院學報;1999年04期

3 石琴;洪洋;張雷;姚成;;拓撲及參數(shù)優(yōu)化方法在專用汽車車架結(jié)構(gòu)設(shè)計中的應(yīng)用[J];機械設(shè)計;2005年12期

4 李競,李尚平,蒲明輝,韋浪舟;注塑機模板的有限元——拓撲優(yōu)化設(shè)計[J];機械設(shè)計與制造工程;2002年06期

5 孫靜;黃雪飛;李慧萍;米小珍;王楓;;基于HyperWorks的流程自動化系統(tǒng)開發(fā)與應(yīng)用[J];鐵路計算機應(yīng)用;2012年12期

相關(guān)碩士學位論文 前1條

1 趙慧慧;重型汽車車架的結(jié)構(gòu)有限元分析與輕量化設(shè)計研究[D];南京航空航天大學;2007年

，

本文編號：2085800