齒輪箱結(jié)構(gòu)的減重優(yōu)化設(shè)計(jì)

此份畢業(yè)設(shè)計(jì)包括,開(kāi)題報(bào)告,畢業(yè)論文,大摘要,和外文原文,翻譯. 論文編號(hào):LX003  字?jǐn)?shù):18664,頁(yè)數(shù):36

摘要

本文以某船用中心傳動(dòng)齒輪箱為研究對(duì)象，分析了齒輪箱結(jié)構(gòu)優(yōu)化設(shè)計(jì)中的具體問(wèn)題，其中包括優(yōu)化分析方法的選擇，優(yōu)化分析的過(guò)程，優(yōu)化數(shù)學(xué)模型的建立，優(yōu)化分析的求解方法等。用MSC.Patran軟件建立中心傳動(dòng)齒輪箱有限元靜力學(xué)模型，并對(duì)箱體結(jié)構(gòu)進(jìn)行靜力分析，根據(jù)分析結(jié)果，為了使齒輪箱結(jié)構(gòu)更為合理，以箱體壁厚作為變量，齒輪箱的總質(zhì)量作為目標(biāo)函數(shù)，再以齒輪箱結(jié)構(gòu)的應(yīng)力和位移作為約束條件，使用MSC.Nastran對(duì)箱體壁厚進(jìn)行優(yōu)化設(shè)計(jì)，使得齒輪箱壁厚在約束條件下得到最優(yōu)解。
  結(jié)果表明，優(yōu)化分析的效果明顯，除去下箱體沒(méi)有參加分析外，齒輪箱的總質(zhì)量從優(yōu)化前的8.5726噸下降到4.5467噸，質(zhì)量下降了46.9%。大大減輕了整個(gè)結(jié)構(gòu)的質(zhì)量，取得了良好的經(jīng)濟(jì)效益。
關(guān)鍵詞：齒輪箱；結(jié)構(gòu)分析；有限元法；優(yōu)化設(shè)計(jì)

Abstract

In this paper, a center drive gearbox for ship is investigated here as a study object. Introduces the optimization analysis of the gearbox, which including the method selecting, the process of analysis, the creating of the mathematical model, and something like that. It is established a center drive gearbox finite element for static mechanical model by MSC.Patran software. And the structure is analyzed by MSC.Patran software. Based on an analysis of results, in order to make the structure more reasonable, the Thickness of gearbox is selected as a variable, and the total mass is selected as an objected function, the strength and the stiffness are selected as constrains. Using of MSC.Nastran to optimize the thickness of the box. The thickness of the box can be the optimal solution under the conditions.
Results show that, the optimization effect is appreciable. Except for the under box, the total mass of the gearbox has greatly decreased from 18422kg to 11608kg, the descending rate reach 37%. This will greatly reduce the mass of the whole structure and produce good economic benefits.
keywords：gearbox; structure analysis; finite element method; optimization design

目 錄
第一章　　前言 ....................................................................1
第一節(jié)　概述 ......................................................................1
第二節(jié)　國(guó)內(nèi)外的現(xiàn)狀 ..............................................................1
第三節(jié)　優(yōu)化分析的意義和主要方法 ..................................................1
第四節(jié)　目的和方法 ................................................................2
第二章　　有限元法理論與應(yīng)用軟件的簡(jiǎn)單介紹 ........................................3
第一節(jié)　有限元理論 ................................................................3
一、有限元優(yōu)點(diǎn) ....................................................................3
二、有限元分析步驟 ................................................................3
第二節(jié)　MSC.Patran/Nastran 軟件介紹 ...............................................6
一、MSC.Patran主要特點(diǎn)及其使用流程 ................................................6
二、MSC.Nastran的主要特點(diǎn)和基本分析功能 ...........................................8
第三章　　齒輪箱結(jié)構(gòu)優(yōu)化設(shè)計(jì)的相關(guān)問(wèn)題 ...........................................11
第一節(jié)　結(jié)構(gòu)優(yōu)化分析設(shè)計(jì) .........................................................11
第二節(jié)　齒輪箱結(jié)構(gòu)優(yōu)化分析方法的選擇 .............................................12
第三節(jié)　齒輪箱結(jié)構(gòu)優(yōu)化分析問(wèn)題的研究 .............................................13
第四節(jié)　齒輪箱結(jié)構(gòu)優(yōu)化分析數(shù)學(xué)模型的建立 .........................................14
第四章　　齒輪箱結(jié)構(gòu)的靜力分析 ...................................................16
第一節(jié)　模型的建立 ...............................................................16
第二節(jié)　靜力分析應(yīng)力、變形響應(yīng) ...................................................23
第五章　　結(jié)構(gòu)優(yōu)化分析 ...........................................................24
第一節(jié)　優(yōu)化分析 .................................................................24
第二節(jié)　優(yōu)化后靜力分析的應(yīng)力、變形響應(yīng) ...........................................28
第三節(jié)　對(duì)優(yōu)化后結(jié)果分析 .........................................................29
結(jié)束語(yǔ) ...........................................................................30
致　謝 ...........................................................................31
參考文獻(xiàn) .........................................................................32