本文選題：強(qiáng)度 + 焊接應(yīng)力��； 參考：《集美大學(xué)》2012年碩士論文

【摘要】：裝載機(jī)前車(chē)架是連接后車(chē)架和工作裝置的重要部件，其它部件裝配在其上并與之形成一定的配合，除了承受自身重量，在作業(yè)和行走過(guò)程中還承受工作裝置傳來(lái)的力和力矩，前車(chē)架的強(qiáng)度、剛度都直接影響整機(jī)的使用效果。裝載機(jī)前車(chē)架主要是通過(guò)一些鋼板焊接而成的，，結(jié)構(gòu)較為復(fù)雜，載荷工況復(fù)雜多變，在使用過(guò)程中經(jīng)常發(fā)生個(gè)別位置強(qiáng)度不足及焊縫開(kāi)裂現(xiàn)象，嚴(yán)重影響整車(chē)安全與使用壽命。 本文以某型號(hào)裝載機(jī)為研究對(duì)象，利用三維實(shí)體軟件Pro/E、動(dòng)力學(xué)仿真軟件ADAMS、有限元仿真軟件Hyperworks和ANSYS完成對(duì)裝載機(jī)模型作業(yè)過(guò)程的模擬、前車(chē)架的強(qiáng)度分析和局部焊接應(yīng)力分析。 通過(guò)三維實(shí)體軟件Pro/E完成裝載機(jī)從車(chē)架到工作裝置的實(shí)體建模，聯(lián)合運(yùn)用動(dòng)力學(xué)仿真軟件ADAMS對(duì)裝載機(jī)進(jìn)行動(dòng)態(tài)仿真模擬，得到前車(chē)架在各工況下的載荷值。驗(yàn)證了Pro/E與ADAMS聯(lián)合運(yùn)用的可行性并提高了工作效率。 利用專(zhuān)業(yè)的網(wǎng)格劃分軟件Hyperworks中的Hypermesh模塊完成對(duì)裝載機(jī)前車(chē)架的網(wǎng)格劃分工作，縮短了網(wǎng)格劃分時(shí)間并提高網(wǎng)格劃分質(zhì)量，在ANSYS軟件中完成對(duì)各個(gè)工況下前車(chē)架的強(qiáng)度分析，找到了結(jié)構(gòu)薄弱部位。 根據(jù)對(duì)前車(chē)架的強(qiáng)度分析結(jié)果，對(duì)比工程中前車(chē)架易發(fā)生焊接開(kāi)裂的地方，利用ANSYS軟件提供的生死單元技術(shù)完成局部焊接應(yīng)力分析，計(jì)算典型焊縫開(kāi)口角度的焊接應(yīng)力，獲得其對(duì)應(yīng)的應(yīng)力分布及其規(guī)律。 本研究為裝載機(jī)前車(chē)架的設(shè)計(jì)提供了理論依據(jù)，對(duì)焊縫開(kāi)口角度提供了指導(dǎo)意見(jiàn)，為動(dòng)力學(xué)分析及優(yōu)化奠定了基礎(chǔ)。
[Abstract]:The front frame of the loader is an important part of connecting the rear frame and the working device. Other parts are assembled on it and cooperate with it to a certain extent. In addition to bearing their own weight, they also bear the force and torque from the working device in the course of operation and walking.The strength and stiffness of the front frame have a direct impact on the use of the whole machine.The front frame of the loader is mainly welded by some steel plates. The structure is more complex and the load condition is complex and changeable. In the process of use, the insufficient strength of individual position and the cracking of welding seam often occur, which seriously affect the safety and service life of the whole vehicle.This paper takes a certain type of loader as the research object, uses the 3D solid software Prop / E, the dynamics simulation software Adams, the finite element simulation software Hyperworks and ANSYS to complete the simulation to the loader model operation process, the front frame strength analysis and the local welding stress analysis.The 3D solid software Pro/E is used to complete the solid modeling of the loader from the frame to the working device. The dynamic simulation of the loader is carried out by using the dynamic simulation software ADAMS, and the load values of the front frame under various working conditions are obtained.The feasibility of combined use of Pro/E and ADAMS is verified and the working efficiency is improved.By using the Hypermesh module of Hyperworks, the grid division of the front frame of loader is completed, which shortens the time of grid division and improves the quality of grid division. The strength analysis of front frame under various working conditions is completed in ANSYS software.The weak part of the structure was found.According to the strength analysis results of the front frame, the welding stress analysis of typical weld opening angle is completed by using the birth and death element technique provided by ANSYS software, and the welding stress of typical weld opening angle is calculated by comparing the welding cracking place of the front frame in engineering.The corresponding stress distribution and its law are obtained.This study provides a theoretical basis for the design of the front frame of the loader, provides guidance for the weld opening angle, and lays a foundation for dynamic analysis and optimization.
【學(xué)位授予單位】：集美大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類(lèi)號(hào)】：TH243

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