發(fā)布時間：2018-08-11 15:25

【摘要】：桁架是金屬結(jié)構(gòu)中的一種主要結(jié)構(gòu)形式，具有重量輕、剛度大、抗震性能好、節(jié)省材料等優(yōu)點，廣泛應用于起重運輸機械、建筑、橋梁、工廠車間以及各種支承骨架等。本文以圓管帶式輸送機為例，對其桁架梁進行有限元分析。在可視化研究過程中，將力學分析分為常規(guī)計算和有限元分析兩大模塊，并將這兩大模塊視為目標系統(tǒng)。 常規(guī)計算模塊：根據(jù)桁架梁的實體模型，建立相應的力學模型。分析桁架梁所承受的各種載荷形式，確定工況并選擇載荷組合，總結(jié)并歸納出桁架梁內(nèi)力計算的遞推公式，計算出桁架梁各桿件的內(nèi)力，，并對桿件的強度、剛度和穩(wěn)定性進行校核，最后生成設(shè)計計算說明書。 有限元分析模塊：建立桁架梁的有限元模型，利用ANSYS軟件進行有限元分析，編寫APDL程序完成有限元前處理、求解和后處理三大步驟的參數(shù)化分析，并輸出應力應變云圖。 本文首先對目標系統(tǒng)進行了總體需求分析，然后在需求分析的基礎(chǔ)上進行了相應的功能分析。根據(jù)桁架梁的力學分析過程，利用Visual C++語言編制相應程序，建立人機友好界面，進行參數(shù)化設(shè)計，實現(xiàn)數(shù)據(jù)共享，提高系統(tǒng)的可視化程度。將分析計算的結(jié)果按照文本形式輸出，生成計算說明書，讓用戶得到精確的數(shù)據(jù)，大大減少了設(shè)計人員的工作量。最后結(jié)合工程實例，用本文設(shè)計的軟件分別運行常規(guī)計算和有限元分析兩大模塊，生成計算說明書，將常規(guī)計算和有限元分析的結(jié)果進行對比，得到有限元分析與常規(guī)計算的結(jié)果相近且均滿足工程要求，體現(xiàn)了基于APDL的桁架梁有限元分析可視化軟件的優(yōu)越性，具有一定的工程實用價值。
[Abstract]:Truss is one of the main structural forms in metal structures, which has the advantages of light weight, large stiffness, good seismic performance and material saving. It is widely used in crane transportation machinery, buildings, bridges, factory workshops and various supporting skeletons. In this paper, the truss beam of circular pipe belt conveyor is analyzed by finite element method. In the process of visualization research, mechanical analysis is divided into two modules: conventional calculation and finite element analysis, and these two modules are regarded as the target system. Conventional calculation module: according to the solid model of truss beam, the corresponding mechanical model is established. This paper analyzes the various load forms of truss beam, determines the working condition and selects the load combination, summarizes and induces the recursive formula for calculating the internal force of the truss beam, calculates the internal force of each member of the truss beam, and the strength of the truss beam. The stiffness and stability are checked and the design calculation instruction is generated. Finite element analysis module: the finite element model of truss beam is established, the finite element analysis is carried out by using ANSYS software, the APDL program is compiled to complete the pre-processing of finite element, the parameterized analysis of the three steps of solving and post-processing, and the output of stress-strain cloud diagram. In this paper, the general requirement analysis of the target system is first carried out, and then the corresponding function analysis is carried out on the basis of the requirement analysis. According to the mechanical analysis process of truss beam, the corresponding program is compiled by Visual C language, and the man-machine friendly interface is established, the parameterized design is carried out, the data sharing is realized, and the visualization degree of the system is improved. The result of analysis and calculation is output according to the text form, and the calculation specification is generated, which makes the user get accurate data and greatly reduces the workload of the designer. Finally, combined with engineering examples, the software designed in this paper is used to run two modules of conventional calculation and finite element analysis, and generate calculation instructions, and compare the results of conventional calculation and finite element analysis. The results of finite element analysis are similar to those of conventional calculation and meet the engineering requirements. It shows the superiority of the visualization software of finite element analysis of truss beam based on APDL and has certain engineering practical value.
【學位授予單位】：太原科技大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH222

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本文編號：2177399