本文選題：多瓣抓斗 + 運(yùn)動(dòng)學(xué)分析�。� 參考：《武漢理工大學(xué)》2015年碩士論文

【摘要】：抓斗是散貨裝卸的一種港口工屬具,由于其具有結(jié)構(gòu)簡單、操作靈活、工作方式穩(wěn)定可靠等優(yōu)點(diǎn),使得其在各國港口的散貨裝卸中成為最主要的裝卸設(shè)備。本文主要是以某港口正在使用的多瓣散貨抓斗對鎳原礦的裝卸為研究對象。因?yàn)樽ザ返淖ト∽枇ψザ返男视兄鴽Q定性的影響,所以本文著重對抓取阻力進(jìn)行分析計(jì)算,仿真研究物料的顆粒度、粘著力、內(nèi)摩擦角這三個(gè)因素對抓斗的抓取阻力矩的影響。本文研究的內(nèi)容主要有以下幾點(diǎn):(1)本論文對抓斗的相關(guān)研究做了概述。對抓斗的研制、抓取阻力研究、抓取仿真研究現(xiàn)狀進(jìn)行了總結(jié),分析了各類抓斗的差異性。另外分析了港口抓斗作業(yè)效率的影響因素,得出了在一定條件下,抓斗的抓取阻力很大程度上決定了抓斗效率的結(jié)論。(2)本論文對抓斗的抓取過程做了運(yùn)動(dòng)學(xué)分析及仿真。以運(yùn)動(dòng)學(xué)為基礎(chǔ),做出抓斗上下圈梁勻速運(yùn)動(dòng)的假設(shè),得出抓斗抓取過程中重要因變的運(yùn)動(dòng)學(xué)數(shù)學(xué)模型并繪出抓斗在抓取過程中的抓取曲線。最后應(yīng)用ADAMS軟件,對抓斗的抓取過程做了運(yùn)動(dòng)學(xué)仿真,得出三個(gè)重要因變量的變化規(guī)律。(3)本文建立了抓斗抓取力學(xué)模型。本文以多瓣抓斗為研究對象,以朗肯土壓力學(xué)理論為基礎(chǔ),結(jié)合多瓣抓斗的結(jié)構(gòu),對抓斗在抓取過程中受到的切入阻力、摩擦阻力、粘著力、推壓阻力進(jìn)行了相應(yīng)的分析計(jì)算。另外根據(jù)功能守恒原理建立了開閉繩電機(jī)電流與鋼絲繩拉力的數(shù)學(xué)關(guān)系,根據(jù)力矩平衡原理對抓斗抓取過程的抓取力學(xué)模型。(4)本論文設(shè)計(jì)測試方案,對抓斗抓取的抓取力學(xué)模型進(jìn)行校正。設(shè)計(jì)抓斗在抓取物料過程中對開閉繩電機(jī)電流的測試平臺(tái),對抓斗的作業(yè)進(jìn)行實(shí)時(shí)監(jiān)測,合理處理采集到的數(shù)據(jù)后,對抓斗抓取力學(xué)模型進(jìn)行校核以及修正。(5)本論文對抓斗的抓取過程應(yīng)用MATLAB進(jìn)行仿真研究。應(yīng)用SIMULINK模塊建立抓斗抓取過程的仿真系統(tǒng),主要仿真研究了物料顆粒度、粘著力、內(nèi)摩擦角這三個(gè)參數(shù)對抓斗抓取阻力矩的影響,并對仿真結(jié)果進(jìn)行了分析。
[Abstract]:Grab bucket is a kind of port equipment for bulk cargo loading and unloading. Because of its simple structure, flexible operation and stable and reliable working mode, grab bucket has become the most important loading and unloading equipment in the ports of various countries. This paper focuses on the loading and unloading of nickel ore by multi-petal bulk grab which is in use in a port. Because the grab resistance of grab has a decisive effect on the efficiency of grab, this paper focuses on the analysis and calculation of grab resistance, and simulates and studies the particle size and adhesion of the material. The influence of three factors, the angle of internal friction, on the grasping resistance moment of grab bucket. The main contents of this paper are as follows: 1) this paper summarizes the relative research of grab bucket. In this paper, the research status of grab bucket, grab resistance and grab simulation is summarized, and the difference of grab bucket is analyzed. In addition, the paper analyzes the factors that affect the efficiency of the port grab operation, and draws the conclusion that the grab resistance determines the grab efficiency to a great extent under certain conditions.) in this paper, kinematics analysis and simulation of the grab process are made. On the basis of kinematics, the assumption of uniform speed motion of upper and lower ring beams of grab bucket is made, and the kinematics mathematical model of the grabbing process is obtained, and the grasping curve of grab bucket in the process of grab is drawn. Finally, by using ADAMS software, kinematics simulation of grab process is done, and three important dependent variables are obtained. (3) the grab mechanics model is established in this paper. Based on the Rankine earth pressure theory and the structure of the multi-flap grab, this paper analyzes and calculates the tangent resistance, friction resistance, adhesion force and push pressure resistance of the grab bucket in the process of grab. In addition, according to the principle of functional conservation, the mathematical relationship between the current of the open and close rope and the tension of the wire rope is established. According to the principle of moment balance, the grasping mechanics model of grab bucket is built. 4) the test scheme is designed in this paper. The grab mechanics model of grab grab is corrected. Design the measuring platform of the current of the open and close rope motor in the process of grab the material, monitor the operation of the grab bucket in real time, deal with the collected data reasonably, The grabbing mechanics model of grab is checked and revised. 5) in this paper, the grab process of grab is simulated by MATLAB. The simulation system of grab grab process is established by using SIMULINK module. The effects of three parameters, such as particle size, adhesion force and internal friction angle, on the grab drag moment are studied, and the simulation results are analyzed.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U653.929.1

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