本文選題：CSP軋機(jī) + 電能諧波　； 參考：《北京科技大學(xué)》2015年博士論文

【摘要】：幾十年來,軋機(jī)振動問題一直是影響軋鋼生產(chǎn)穩(wěn)定和產(chǎn)品質(zhì)量的難題,隨著現(xiàn)代連軋機(jī)裝備技術(shù)的發(fā)展,軋機(jī)振動現(xiàn)象及特性表現(xiàn)得更加復(fù)雜。本文重點以某廠交-交變頻驅(qū)動的CSP熱連軋機(jī)F3主傳動系統(tǒng)扭振問題為研究對象,通過現(xiàn)場測試發(fā)現(xiàn)軋機(jī)在軋制過程中表現(xiàn)出多態(tài)耦合振動現(xiàn)象。通過理論分析、數(shù)值仿真及實驗驗證等多種手段對該熱連軋機(jī)耦合振動機(jī)理進(jìn)行了深入研究并提出了抑振措施。本文的主要工作及研究成果如下： (1)利用自制的軋機(jī)耦合振動在線監(jiān)測系統(tǒng)對CSP軋機(jī)振動進(jìn)行了綜合測試,得到在不同工況下的振動行為及特征,實驗證明了該熱連軋機(jī)在軋制薄帶鋼時存在復(fù)雜性耦合振動行為并伴隨著復(fù)雜的諧波現(xiàn)象,為理論研究軋機(jī)耦合振動機(jī)理提供了科學(xué)依據(jù)。 (2)以該熱連軋機(jī)為研究對象,建立了交交變頻一同步電機(jī)*軋機(jī)主傳動*輥系負(fù)載的解析模型,得到各單元相互耦合的關(guān)聯(lián)變量,獲得了電能諧波與軋機(jī)輥系通過傳動及軋制變形區(qū)相耦合的理論模型。 (3)利用Matlab/Simulink及ANSYS等計算軟件,分別研究了電能驅(qū)動變頻諧波和軋制負(fù)載諧波與軋機(jī)傳動機(jī)械的耦合機(jī)制。認(rèn)為軋機(jī)傳動系統(tǒng)扭振是受驅(qū)動能量源、負(fù)載擾動源及機(jī)械傳動(能量傳遞源)綜合影響下的耦合振動行為,其研究結(jié)果得到了實驗驗證。 (4)考慮軋機(jī)傳動在電能諧波源與負(fù)載諧波源雙重激勵下,分別以穩(wěn)態(tài)加載條件下的多自由度線性模型和非線性剛度、阻尼的雙重非線性等效模型,對軋機(jī)傳動系統(tǒng)扭振特性進(jìn)行了理論求解及仿真研究。結(jié)果表明軋機(jī)傳動系統(tǒng)在多源諧波激勵下呈現(xiàn)多態(tài)耦合振動特征。 (5)依據(jù)現(xiàn)場測試、理論研究和仿真分析,提出該熱連軋機(jī)振動抑振措施,從抑制電能質(zhì)量諧波和軋制負(fù)載力矩擾動以及改變傳動結(jié)構(gòu)參數(shù)等角度進(jìn)行了理論仿真和現(xiàn)場應(yīng)用實驗,取得了良好效果。
[Abstract]:In recent decades, rolling mill vibration has been a difficult problem affecting the stability of rolling mill production and product quality. With the development of equipment technology of modern tandem rolling mill, the vibration phenomenon and characteristics of rolling mill are more complicated. In this paper, the torsional vibration of F3 main drive system of CSP hot strip mill driven by AC-AC frequency conversion is taken as the research object. Through field test, it is found that the rolling mill exhibits the phenomenon of polymorphic coupling vibration. Through theoretical analysis, numerical simulation and experimental verification, the coupled vibration mechanism of the hot strip mill was studied and the vibration suppression measures were put forward. The main work and results of this paper are as follows: 1) the vibration of CSP rolling mill is comprehensively tested by the self-made on-line monitoring system of rolling mill coupling vibration, and the vibration behavior and characteristics of CSP mill under different working conditions are obtained. The experimental results show that the hot strip rolling mill has complex coupled vibration behavior and complicated harmonic phenomenon, which provides a scientific basis for the theoretical study of the coupled vibration mechanism of rolling mill. The analytical model of the main drive * roll system load of AC-AC frequency conversion synchronous motor * mill is established, and the relative variables of each unit coupling with each other are obtained. A theoretical model of coupling of electric energy harmonics with rolling deformation zone is obtained. The coupling mechanism of power drive harmonic with rolling load harmonics and rolling load harmonics is studied by Matlab / Simulink and ANSYS respectively. It is considered that torsional vibration of rolling mill transmission system is coupled vibration behavior under the combined influence of driving energy source, load disturbance source and mechanical transmission (energy transfer source). The experimental results are verified by experiments. Considering the dual excitation of power harmonic source and load harmonic source, the rolling mill drive is modeled by the linear model of multiple degrees of freedom and the double nonlinear equivalent model of nonlinear stiffness and damping under steady loading condition, respectively. The torsional vibration characteristics of rolling mill transmission system are theoretically solved and simulated. The results show that the transmission system of rolling mill presents the characteristic of polymorphic coupling vibration under multi-source harmonic excitation. Based on the field test, theoretical research and simulation analysis, the vibration suppression measures of the hot strip mill are put forward. Theoretical simulation and field application experiments are carried out from the aspects of suppressing harmonic of power quality and disturbance of rolling load torque and changing transmission structural parameters. Good results are obtained.
【學(xué)位授予單位】：北京科技大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2015
【分類號】：TG333

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本文編號：2005244