發(fā)布時間：2018-02-24 17:26

  本文關(guān)鍵詞： 矮塔斜拉橋 ANSYS 參數(shù)化建模 單目標(biāo)優(yōu)化 多目標(biāo)優(yōu)化　出處：《大連海事大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：為滿足我國科學(xué)技術(shù)與經(jīng)濟的快速發(fā)展,矮塔斜拉橋的建設(shè)已成為現(xiàn)代的需求。隨著矮塔斜拉橋跨度的不斷增加,設(shè)計難度與施工難度越來越大。與此同時,設(shè)計與施工帶來的成本也越來越高。因此,如何在保證安全可靠的基礎(chǔ)上使得成本最低已經(jīng)成為廣大學(xué)者研究的方向。本文借助大連市長山大橋為背景,利用有限元軟件ANSYS進行優(yōu)化設(shè)計分析。首先,本文通過總結(jié)斜拉橋的發(fā)展歷史與廣大學(xué)者的研究成果,提出研究的方向與現(xiàn)代斜拉橋面臨的挑戰(zhàn)。其次,介紹了有關(guān)優(yōu)化設(shè)計的一些概念、研究方法與設(shè)計步驟。同時,提出了結(jié)構(gòu)優(yōu)化設(shè)計的一些基本理論和數(shù)學(xué)模型。再次,本文分三部分進行優(yōu)化。第一部分為橋墩的優(yōu)化。選取單支墩厚度為設(shè)計變量,以橋墩強度和穩(wěn)定性等作為約束條件,目標(biāo)函數(shù)選取橋墩截面面積。通過零階優(yōu)化和一階優(yōu)化,得出優(yōu)化結(jié)果,再與實際結(jié)果對比。第二部分為斜拉索的優(yōu)化。選取斜拉索的初始應(yīng)變?yōu)樵O(shè)計變量,以跨中位移為目標(biāo)函數(shù),通過優(yōu)化降低索力。第三部分為多目標(biāo)優(yōu)化。通過將前兩部分聯(lián)合優(yōu)化,最終得到了多目標(biāo)優(yōu)化的最優(yōu)計算結(jié)果。最后,通過總結(jié)各章節(jié)的計算分析結(jié)果,提出一些建設(shè)性意見與展望,為斜拉橋的設(shè)計施工提供了一定的參考價值。
[Abstract]:In order to meet the rapid development of science and technology and economy in China, the construction of cable-stayed bridge with low tower has become a modern demand. With the increasing span of cable-stayed bridge with low tower, the design and construction are becoming more and more difficult. Therefore, how to ensure the lowest cost on the basis of safety and reliability has become the research direction of the majority of scholars. The background of this paper is the Changshan Bridge in Dalian. The finite element software ANSYS is used to analyze the optimal design. Firstly, by summarizing the development history of cable-stayed bridge and the research results of many scholars, this paper puts forward the research direction and the challenge of modern cable-stayed bridge. This paper introduces some concepts, research methods and design steps of optimization design. At the same time, some basic theories and mathematical models of structural optimization design are put forward. This paper is divided into three parts. The first part is the optimization of bridge piers. The thickness of single pier is chosen as design variable, the strength and stability of pier are taken as constraint conditions, and the cross-section area of pier is selected by objective function. Through zero order optimization and first order optimization, The optimization results are obtained and compared with the actual results. The second part is the optimization of the stay cables. The initial strain of the stay cables is selected as the design variable, and the mid-span displacement is taken as the objective function. The third part is multi-objective optimization. By combining the first two parts, the optimal calculation results of multi-objective optimization are obtained. Finally, by summing up the results of calculation and analysis of each chapter, Some constructive suggestions and prospects are put forward, which provide a certain reference value for the design and construction of cable-stayed bridges.
【學(xué)位授予單位】：大連海事大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U442.5

【參考文獻】

相關(guān)期刊論文 前1條

1 孫蕾;任曉琳;孟輝;;基于ANSYS的橋梁結(jié)構(gòu)拓撲優(yōu)化設(shè)計[J];中國高新技術(shù)企業(yè);2009年20期

，

本文編號：1531094