本文關(guān)鍵詞： 磨料水射流 表面粗糙度 模糊理論 MATLAB　出處：《中國(guó)礦業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：磨料水射流切割技術(shù)經(jīng)過30多年的發(fā)展,已日趨成熟,成為21世紀(jì)優(yōu)先發(fā)展的主流切割技術(shù)。磨料水射流的切割機(jī)理開始成為各國(guó)專家和學(xué)者關(guān)注和研究的課題。本文首先對(duì)磨料水射流的切割機(jī)理和模型進(jìn)行了比較系統(tǒng)的理論分析,詳細(xì)描述了磨料粒子的受力過程和加速機(jī)理,并對(duì)切割表面余紋產(chǎn)生的過程及原因進(jìn)行了分析研究。本文在切割理論的指導(dǎo)下,利用實(shí)驗(yàn)室的前混合磨料水射流切割設(shè)備,選擇射流壓力、切割速度、靶距及磨料粒徑作為實(shí)驗(yàn)變量,設(shè)計(jì)正交實(shí)驗(yàn)對(duì)1060鋁合金進(jìn)行切割,分析研究了磨料水射流切割性能(切面粗糙度)與各參數(shù)變量之間的關(guān)系和規(guī)律。同時(shí),在研究總結(jié)磨料水射流切割工藝特點(diǎn)的基礎(chǔ)上,應(yīng)用模糊推理系統(tǒng)建立了前混合磨料水射流切割的ANFIS模糊模型結(jié)構(gòu);本文采用高木—關(guān)野模糊系統(tǒng)分別建立了上部粗糙度預(yù)測(cè)模型、下部粗糙度預(yù)測(cè)模型和切割速度預(yù)測(cè)模型;利用實(shí)驗(yàn)研究所獲得的大量樣本數(shù)據(jù),基于MATLAB編程實(shí)現(xiàn)自適應(yīng)模糊推理模型的訓(xùn)練,并對(duì)模型進(jìn)行了驗(yàn)證。通過驗(yàn)證模糊模型輸出與實(shí)驗(yàn)值的對(duì)比,可以看出基于ANFIS的模糊模型結(jié)構(gòu)的輸出能夠較好的擬合和表征實(shí)驗(yàn)數(shù)據(jù)的規(guī)律和趨勢(shì)。
[Abstract]:After more than 30 years' development, abrasive water jet cutting technology has become more and more mature. In 21th century, the cutting mechanism of abrasive water jet has become the main cutting technology. The cutting mechanism of abrasive water jet has become a topic of concern and research by experts and scholars all over the world. Firstly, the cutting mechanism and model of abrasive water jet are compared in this paper. The theoretical analysis of the system, The mechanical process and acceleration mechanism of abrasive particles are described in detail, and the process and cause of the residual grain on the cutting surface are analyzed and studied. Under the guidance of cutting theory, this paper uses the pre-mixed abrasive water jet cutting equipment in the laboratory. Choosing jet pressure, cutting speed, target distance and abrasive particle size as experimental variables, orthogonal experiment was designed to cut 1060 aluminum alloy. The relationship between abrasive water jet cutting performance (cutting surface roughness) and various parameter variables is analyzed and studied. At the same time, the characteristics of abrasive water jet cutting technology are summarized. The ANFIS fuzzy model structure of pre-mixed abrasive water jet cutting is established by using fuzzy inference system, the upper roughness prediction model, the lower roughness prediction model and the cutting speed prediction model are established by using the high-wood and off-field fuzzy system respectively. The training of adaptive fuzzy reasoning model based on MATLAB programming is realized by using a large number of sample data obtained from experimental research, and the model is verified. The comparison between the output of fuzzy model and the experimental value is carried out. It can be seen that the output of fuzzy model structure based on ANFIS can fit and characterize the rule and trend of experimental data.
【學(xué)位授予單位】：中國(guó)礦業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TG664

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本文編號(hào)：1543912