本文關(guān)鍵詞：基于輥系剛?cè)狁詈咸匦缘陌鍘к垯C(jī)系統(tǒng)動(dòng)力學(xué)建模研究　出處：《燕山大學(xué)》2016年博士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 板帶軋機(jī) 軋機(jī)輥系 運(yùn)動(dòng)板帶 耦合振動(dòng)模型 剛?cè)狁詈蟿?dòng)力學(xué)模型

【摘要】：金屬板帶在國(guó)民經(jīng)濟(jì)和國(guó)防現(xiàn)代化建設(shè)中起著非常重要的作用。軋制過程是一個(gè)典型的復(fù)雜非線性動(dòng)態(tài)過程,其動(dòng)力學(xué)特性是由軋機(jī)輥系和運(yùn)動(dòng)板帶的不同物理屬性的運(yùn)動(dòng)通過相互耦合作用而決定的。本文以四輥熱連軋機(jī)組為研究對(duì)象,通過分析軋制過程中輥系、板帶的運(yùn)動(dòng)特征及其耦合關(guān)系,揭示基于輥系剛?cè)狁詈咸匦缘陌鍘к垯C(jī)系統(tǒng)動(dòng)力學(xué)機(jī)理,建立相應(yīng)動(dòng)力學(xué)模型,并在此基礎(chǔ)上進(jìn)行仿真分析。綜合考慮輥系的垂直運(yùn)動(dòng)、水平運(yùn)動(dòng)、軋輥的轉(zhuǎn)動(dòng)以及板帶剛性運(yùn)動(dòng)和彈性變形,通過動(dòng)力學(xué)分析,實(shí)現(xiàn)柔性多體機(jī)械系統(tǒng)中剛體和可變形體位移場(chǎng)的描述,進(jìn)而確定由于系統(tǒng)構(gòu)件剛性運(yùn)動(dòng)與彈性變形同時(shí)作用引起的強(qiáng)非線性慣性耦合與剛度耦合作用規(guī)律,建立板帶軋機(jī)輥系剛性振動(dòng)耦合動(dòng)力學(xué)機(jī)理模型,分析耦合作用下輥系的動(dòng)態(tài)響應(yīng)和軋機(jī)工作穩(wěn)定性,為實(shí)現(xiàn)軋件厚度動(dòng)態(tài)控制提供理論依據(jù)。充分考慮軋制過程中軋機(jī)系統(tǒng)剛性振動(dòng)對(duì)軋輥彎曲變形動(dòng)特性的影響。通過運(yùn)動(dòng)學(xué)分析,實(shí)現(xiàn)柔性多體機(jī)械系統(tǒng)中剛體和可變形體的位移場(chǎng)描述,建立板帶軋機(jī)輥系剛?cè)狁詈蟿?dòng)力學(xué)模型。對(duì)軋機(jī)輥系進(jìn)行耦合運(yùn)動(dòng)模態(tài)分析,進(jìn)一步探討軋輥?zhàn)冃芜\(yùn)動(dòng)振動(dòng)頻率和模態(tài)振型函數(shù)的解析解,并比較不同時(shí)刻下,由傳統(tǒng)結(jié)構(gòu)動(dòng)力學(xué)求得的軋輥固有模態(tài)振型函數(shù)與考慮軋機(jī)系統(tǒng)剛性振動(dòng)時(shí)的軋輥模態(tài)振型函數(shù)的區(qū)別�？紤]軋制過程中軋輥運(yùn)動(dòng)與軋制變形區(qū)動(dòng)特性的耦合作用規(guī)律,通過運(yùn)動(dòng)學(xué)分析,實(shí)現(xiàn)輥系-軋件動(dòng)力學(xué)系統(tǒng)的位移場(chǎng)描述,建立板帶軋機(jī)輥系-軋件多參數(shù)耦合動(dòng)力學(xué)模型。對(duì)軋機(jī)輥系進(jìn)行耦合運(yùn)動(dòng)模態(tài)分析,進(jìn)一步探討軋輥?zhàn)冃文B(tài)振型函數(shù)的解析解,并分析變形區(qū)內(nèi)金屬橫向流動(dòng)位移的運(yùn)動(dòng)特征。建立基于輥系剛?cè)狁詈咸匦缘陌鍘к垯C(jī)系統(tǒng)動(dòng)力學(xué)仿真模型,包括以下幾方面:軋機(jī)輥系剛性振動(dòng)耦合動(dòng)力學(xué)模型、軋機(jī)輥系剛?cè)狁詈蟿?dòng)力學(xué)模型、軋制變形區(qū)耦合動(dòng)力學(xué)模型。同時(shí)考慮工作輥沿垂直和水平方向的運(yùn)動(dòng)特征,對(duì)變形區(qū)軋制力學(xué)模型進(jìn)行了修正。由于軋輥橫向模態(tài)函數(shù)隨輥系剛性運(yùn)動(dòng)而時(shí)刻變化,基于模型本身特點(diǎn),選取了中心差分法對(duì)系統(tǒng)進(jìn)行仿真計(jì)算。從而得到基于輥系剛?cè)狁詈咸匦缘陌鍘к垯C(jī)系統(tǒng)動(dòng)力學(xué)模型,并進(jìn)行了仿真分析。該模型可對(duì)軋制過程進(jìn)行模擬,能反映板形板厚綜合動(dòng)態(tài)信息,為虛擬軋制提供理論基礎(chǔ),并為先進(jìn)控制理論應(yīng)用提供平臺(tái)。本文從物理、力學(xué)特性的角度出發(fā),結(jié)合軋件-輥系耦合非均勻變形,真實(shí)的反映出軋機(jī)輥系和金屬板帶動(dòng)態(tài)特性,揭示了軋制過程中軋制穩(wěn)定性、帶鋼表面振紋、咬鋼拋鋼等動(dòng)態(tài)過程的產(chǎn)生機(jī)理。耦合動(dòng)力學(xué)機(jī)理模型對(duì)推動(dòng)軋機(jī)系統(tǒng)動(dòng)態(tài)建模的發(fā)展,提高軋制過程控制精度具有重要理論和實(shí)用價(jià)值。
[Abstract]:Metal strip plays a very important role in national economy and national defense modernization. Rolling process is a typical complex nonlinear dynamic process. Its dynamic characteristics are determined by the interaction between the motion of different physical properties of the rolling mill roll system and the moving plate strip. This paper takes the four-high hot strip mill as the research object and analyzes the roll system during the rolling process. The motion characteristics of plate and strip and its coupling relationship reveal the dynamic mechanism of strip rolling mill system based on roll system rigid-flexible coupling characteristics and establish the corresponding dynamic model. On the basis of the simulation analysis, the vertical motion, horizontal movement, roll rotation, rigid motion and elastic deformation of the strip were considered synthetically, and the dynamic analysis was carried out. The displacement field of rigid body and variable body in flexible multi-body mechanical system is described, and the law of strong nonlinear inertial coupling and stiffness coupling caused by the simultaneous action of rigid motion and elastic deformation of the system member is determined. The dynamic mechanism model of rigid vibration coupling of roll system of strip mill is established, and the dynamic response of roll system and the working stability of rolling mill under coupling action are analyzed. This paper provides a theoretical basis for dynamic control of roll thickness and fully considers the influence of the rigid vibration of rolling mill system on the dynamic characteristics of roll bending deformation. The kinematics analysis is carried out. The displacement field of rigid body and variable body in flexible multi-body mechanical system is described, and the rigid-flexible coupling dynamic model of roll system of plate and strip mill is established, and the coupling motion modal analysis of roll system of rolling mill is carried out. The analytical solutions of vibration frequency and modal mode function of roll deformation motion are discussed and compared at different times. The difference between the inherent modal mode function of roller obtained from the traditional structural dynamics and the modal mode function of roll considering the rigid vibration of rolling mill system. The coupling of roll motion and dynamic characteristics of rolling deformation zone during rolling process is considered. Use the pattern. Through kinematics analysis, the displacement field description of roll system and rolling piece dynamics system is realized, and the multi-parameter coupling dynamic model of strip mill roll system is established, and the coupling motion mode analysis of rolling mill roll system is carried out. The dynamic simulation model of strip rolling mill system based on the coupling characteristics of rigid and flexible roll system is established by analyzing the analytical solution of the modal mode mode function of roll deformation and the kinematic characteristics of metal transverse flow in the deformation zone. It includes the following aspects: the dynamic model of rigid vibration coupling of rolling mill roll system, the rigid-flexible coupling dynamic model of rolling mill roll system. The coupled dynamic model of rolling deformation zone is developed, and the motion characteristics of the work roll along the vertical and horizontal directions are taken into account at the same time. The rolling mechanics model in the deformation zone is modified. Because the lateral mode function of roll changes with the rigid movement of the roll system, it is based on the characteristics of the model itself. The central differential method is selected to simulate the system, and then the dynamic model of strip mill system based on the coupling characteristics of rigid and flexible roll system is obtained, and the simulation analysis is carried out. The model can be used to simulate the rolling process. It can reflect the comprehensive dynamic information of plate thickness, provide the theoretical basis for virtual rolling, and provide a platform for the application of advanced control theory. This paper starts from the point of view of physical and mechanical properties. Combined with the coupling non-uniform deformation of workpiece and roll system, the dynamic characteristics of roll system and metal strip are truly reflected, and the rolling stability and strip surface vibration are revealed during the rolling process. The coupling dynamic mechanism model has important theoretical and practical value in promoting the development of dynamic modeling of rolling mill system and improving the control precision of rolling process.
【學(xué)位授予單位】：燕山大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2016
【分類號(hào)】：TG333.7

【參考文獻(xiàn)】

相關(guān)期刊論文 前6條

1 譚樹彬;鐘云峰;劉建昌;徐心和;;軋機(jī)輥縫控制建模及仿真[J];系統(tǒng)仿真學(xué)報(bào);2006年06期

2 趙麗娟;才宏;劉杰;;四輥冷連軋機(jī)液壓壓下系統(tǒng)建模研究[J];機(jī)床與液壓;2006年02期

3 楊躍輝;鄭申白;;熱連軋機(jī)的仿真研究[J];河北理工學(xué)院學(xué)報(bào);2005年04期

4 王正林,童朝南,孫一康,彭開香;帶鋼熱連軋AGC系統(tǒng)實(shí)時(shí)仿真[J];北京科技大學(xué)學(xué)報(bào);2005年05期

5 王君,王國(guó)棟;各種壓力AGC模型的分析與評(píng)價(jià)[J];軋鋼;2001年05期

6 林寶玖,謝傳鋒;撓性多體系統(tǒng)動(dòng)力學(xué)[J];力學(xué)學(xué)報(bào);1989年04期

相關(guān)博士學(xué)位論文 前1條

1 楊景明;IGC650HCW冷帶軋機(jī)控制系統(tǒng)關(guān)鍵技術(shù)研究[D];燕山大學(xué);2000年

，

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