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investigation for parametric vibration of rolling mill

Investigation for parametric vibration of rolling mill ...

Request PDF Investigation for parametric vibration of rolling mill The vibration unsteady condition of rolling mill caused by flexural vibration of strip has been investigated. The parametric ...

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Investigation for parametric vibration of rolling mill TANG Hua-ping( 1, DING Rui(T O) , WU Yun-xin( ZHONG ( College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China; 2. Department of Mathematics, Suzhou U niversity, Suzhou 215006 China) [ Abstract] The vibration unsteady condition of rolling mill caused by flexural vibration

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Investigation into the electromechanical coupling ...

2002-10-11  In this paper, the unsteady condition of rolling mill vibration caused by flexural-vibration of the strip is investigated. The parametric flexural-vib

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Investigation into the electromechanical coupling ...

In this paper, the unsteady condition of rolling mill vibration caused by flexural-vibration of the strip is investigated. The parametric flexural-vibration equation of a rolled strip is established.

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Experimental and Numerical Investigation of the Vibration ...

tion in the vibration of the mill. Self-excited and nonlinear parametric vibration in the cold rolling processes was ana-lyzed by Bar and Swiatoniowski.6) Chatter vibration of a cold rolling mill was analyzed using the finite element method to investigate the influence of rolling parameters such as rolling speed, reduction of

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Nonlinear Dynamics of Torsional Vibration for Rolling Mill ...

2013-01-01  In actual application, the increasing of the damping coefficient and the reduc­ tion of the rionlinear stiffness can lower the vibration intensity of the rolling mill. In the rolling process, the vibration is weakest when the angle of the joint­ ed shaft is 4. 761 3°.

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Investigation into sources of chatter and vibrations in ...

Chatter in rolling is a particular case of self-excited vibrations which is considered to be the result of interaction between rolling mill structure and rolling process. Three basic types of ...

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Active vibration suppression for rolling mills vibration ...

Rolling mills vibration is a key factor that hinders the production of thin-strip steel. Currently, vibration is mainly suppressed by adjusting rolling mill parameters

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Nonlinear Dynamics of Torsional Vibration for Rolling Mill ...

2013-01-01  In actual application, the increasing of the damping coefficient and the reduc­ tion of the rionlinear stiffness can lower the vibration intensity of the rolling mill. In the rolling process, the vibration is weakest when the angle of the joint­ ed shaft is 4. 761 3°.

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Numerical analysis of the vertical vibrations of rolling ...

2005-05-15  Earlier modal analysis of the classical discrete-continuous model indicates that for vibrations with the second mode shape (for frequencies 120–150 Hz) the roller pairs (consisting of the working and backing rolls) behave as rigidly connected lump masses, and so a lumped-parameter model of the rolling stand is used in the present paper.

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Vibration Characteristics of Rolling Mill System under ...

The vibration of rolling mill system is influenced by the nonlinear spring force and nonlinear friction force of the hydraulic cylinder of rolling mill. By taking different nonlinear spring force and friction coefficient, the variation law of time-domain response is simulated and analyzed. The simulation results are shown in

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Dynamic analysis and control of strip mill vibration under ...

The unsteady vibration phenomenon has been explained, and importance to the parametric vibration of the rolling mill is attached [11, 12]. Orlowska-Kowalska et al. proposed an adaptive robust control system. The experiment proved that the system had good damping effect and successfully suppressed the torsional vibration of the rolling mill.

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Nonlinear Torsional Vibration Dynamics Behaviors of ...

Considering the influence caused by joint angle, nonlinear damping, and nonlinear rigidity, the nonlinear torsional vibration dynamical modeling of the multi-DOF rolling mill’s main drive system is established. To analyze the coupled equations by analytic method, the equations are decoupled by transforming them into principal coordinates.

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Rolling mill chatter mechanism based on the unsteady ...

Previous researches have proven that the self-excited vibration of the rolling mill derives from the roll bite. The vertical vibration, torsional vibration and horizontal vibration of mill stand couple together through the changing lubrication at roll bite.

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Coupled Vibration Behavior of Hot Rolling Mill Rolls under ...

A coupled vibration model of hot rolling mill rolls under multiple nonlinear effects is established by considering the nonlinear spring force produced by the hydraulic cylinder, the nonlinear friction between the work rolls, the dynamic variation of rolling force, and the effect of external excitation as well as according to the structural constraints of a four-high hot rolling mill in the vertical and horizontal

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An Investigation of Head-Sea Parametric Rolling and Its ...

This investigation and other recent studies demonstrate that parametric roll in extreme head or near head seas can occur when unfavorable tuning is combined with low roll damping (reduced speed) and large stability variations (governed by wavelength, wave height, general hull form, bow flare, and stern shapes). Parametric rolling is an unstable phenomenon, which can quickly generate large roll ...

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mill vibration during cold rolling - proves-projekt.de

Jun , cold rolling mills show a complex vibration behavior, consisting of natural vibrations of the plant mechanics as well as excitations from the drive or bearings but also vibrations caused by defects the aim of the monitoring is to detect vibrations that are caused by external excitation or faults. Vertical Vibration Model for Unsteady Lubrication in Rolls . The cold rolling process is a ...

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Non-Linear Vibration and Stability of Moving Strip With ...

2010-06-01  Journal of Sound and Vibration, 2003, 268(4): 679. [9J TANG Hua-ping, DING Rui, WU Yun-xin, Investigation for Parametric Vibration of Rolling Mill []J. Trans Nonferrous Met Soc China, 2002, 12(3): 485. [10J Kong L, Parker R G. Approximate Eigensolutions of Axially Moving Beam With Small Flexural Stiffness [J]. Journal of Sound and Vibration, 2004, 276(1): 459. Recommended

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Vibration Characteristics of Rolling Mill System under ...

The rolling mill hydraulic cylinder is a typical nonlinear component in the rolling mill system, and the influence of nonlinear constraints on the vibration behavior of the rolling mill system cannot be ignored. The coefficient of friction between the cylinder and the piston will change due to the periodic change of the vibration velocity of the hydraulic cylinder, and the friction exhibits ...

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Study on Nonlinear Parametrically Excited Vibration in ...

2012-12-07  rolling mill automatic gauge control(AGC) nonlinear vibration parametric excitation chaos This is a preview of subscription content, log in to check access. Preview

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Nonlinear Dynamics of Torsional Vibration for Rolling Mill ...

The jointed shaft in the drivelines of the rolling mill, with its angle continuously varying in the production, has obvious impact on the stability of the main drive system. Considering the effect caused by the joint angle and friction force of roller gap, the nonlinear vibration model of the main drive system which contains parametric excitation stiffness and nonlinear friction damping was ...

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Parametric resonances for torsional vibration of excited ...

Amer, Y, El-Sayed, A, El-Bahrawy, F (2015) Torsional vibration reduction for rolling mill’s main drive system via negative velocity feedback under parametric excitation. Journal of Mechanical Science and Technology 29: 1581 – 1589. Google Scholar

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Rolling mill chatter mechanism based on the unsteady ...

In Ref [19], the vibration signals of a rolling mill were detected many times and the rolling parameters were recorded. Through the statistical analysis of the parameters, the influence of parameters on the stability of the rolling mill can be concluded. According to the statistical result, as can been in Fig. 13, smaller the rolling reduction and larger the entry stress tension is, the

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Research Article Nonlinear Torsional Vibration Dynamics ...

Nonlinear Torsional Vibration Dynamics Behaviors of Rolling Mill s Multi-DOF Main Drive System under Parametric Excitation DongyingHan, 1 PeimingShi, 2 andKeweiXia 2 College of Vehicles and Energy, Yanshan University, Qinhuangdao , China College of Electrical Engineering, Yanshan University, Qinhuangdao , China Correspondence should be addressed to Dongying

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An Investigation of Head-Sea Parametric Rolling and Its ...

This investigation and other recent studies demonstrate that parametric roll in extreme head or near head seas can occur when unfavorable tuning is combined with low roll damping (reduced speed) and large stability variations (governed by wavelength, wave height, general hull form, bow flare, and stern shapes). Parametric rolling is an unstable phenomenon, which can quickly

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Han , Shi , Xia : Nonlinear Torsional Vibration Dynamics ...

Nonlinear Torsional Vibration Dynamics Behaviors of Rolling Mill’s Multi-DOF Main Drive System under Parametric Excitation. Dongying Han, Peiming Shi, and Kewei Xia. Full-text: Open access. Enhanced PDF (814 KB) Abstract; Article info and citation; First page; References; Abstract. Considering the influence caused by joint angle, nonlinear damping, and nonlinear

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Vibration characteristics of multi-parametric excitations ...

Vibration characteristics of multi-parametric excitations and multi-frequency external excitations of rolling mill under entry thickness fuctuation of strip: Teng Xu 1, Dong‑xiao Hou 1, Zheng‑nan Sun 1, Da‑wu Guo 1: 1 School of Control Engineering, Northeastern University at Qinhuangdao, Qinhuangdao 066004, Hebei, China

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mill vibration during cold rolling - proves-projekt.de

Jun , cold rolling mills show a complex vibration behavior, consisting of natural vibrations of the plant mechanics as well as excitations from the drive or bearings but also vibrations caused by defects the aim of the monitoring is to detect vibrations that are caused by external excitation or faults. Vertical Vibration Model for Unsteady Lubrication in Rolls . The cold rolling process

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Vibration characteristics of multi-parametric excitations and multi-frequency external excitations of rolling mill ...

Vibration characteristics of multi-parametric excitations and multi-frequency external excitations of rolling mill under entry thickness fuctuation of strip: Teng Xu 1, Dong‑xiao Hou 1, Zheng‑nan Sun 1, Da‑wu Guo 1: 1 School of Control Engineering, Northeastern University at Qinhuangdao, Qinhuangdao 066004, Hebei, China

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Nonlinear Torsional Vibration Dynamics Behaviors of Rolling Mill's Multi-DOF Main Drive System under Parametric ...

Considering the influence caused by joint angle, nonlinear damping, and nonlinear rigidity, the nonlinear torsional vibration dynamical modeling of the multi-DOF rolling mill’s main drive system is established. To analyze the coupled equations by analytic method, the equations are decoupled by transforming them into principal coordinates. The amplitude-frequency characteristic equations are ...

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Torsional vibration reduction for rolling mill’s main drive system via negative velocity feedback under parametric ...

2015-04-14  Jointed shaft is a commonly used element in drive trains of rolling mill. The torsional vibrations of one- degree -of freedom nonlinear dynamical system are controlled using active control. The multiple scale perturbation technique used to get the approximate solution of the differential equation describes the system. The worst resonance cases were deduced and the frequency response function ...

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Research on strip hysteretic behavior and mill vertical vibration system nonlinear dynamics

Rolling mill vibration is a technical problem in the iron and steel industry for many years and has serious impact and harm on production. There were serious vibrations in the middle mills when rolling thin container strip for the compact strip production (CSP) strip hot rolling process. This paper studied the hysteretic characteristic of rolled strip and established the vertical vibration ...

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Optimization design of a novel X-type six-high rolling mill based

2020-02-19  The present investigation devices a novel X-type six-high (X-6h) mill. In addition, parametric models of different roll layouts such as the four-high (4-h), I-type six-high (I-6h), and X-6h mills are established. Three-dimensional (3D) finite element (FE) contact analysis for a strip rolling process is conducted when the mills are subjected to a constant vertical load of 65 kN.

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Research on the Vertical Vibration Characteristics of Hydraulic Screw Down System of Rolling Mill

The rolling mill with hydraulic system is widely used in the production of strip steel. For the problem of vertical vibration of the rolling mill, the effects of different equivalent damping coefficient, leakage coefficient, and proportional coefficient of the controller on the hydraulic screw down system of the rolling mill are studied, respectively. First, a vertical vibration model of a ...

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Coupling vibration model for hot rolling mills and its application

In this paper, we propose an effective mechanical-electrical-hydraulic-interfacial coupling vibration model for hot rolling mills and obtain a practical measure to relieve mill vibration. First, an experiment related to mill modulus control gain in automatic gauge control (AGC) is carried out during manufacturing. Rolling mill vibration is observed to gradually be enhanced with increasing mill ...

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Stability Analysis of a Nonlinear Coupled Vibration Model in a Tandem Cold Rolling Mill

Mill chatter in tandem cold rolling mill is a major rejection to the quality and production of the strips. In most mill vibration models, either the roll mass is usually limited to vibrate in vertical direction and vertical-horizontal directions, or the multiple rolls system is simplified to a single mass system. However, the torsional chatter is also a typical type of mill chatter, and the ...

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mill vibration during cold rolling - proves-projekt.de

Jun , cold rolling mills show a complex vibration behavior, consisting of natural vibrations of the plant mechanics as well as excitations from the drive or bearings but also vibrations caused by defects the aim of the monitoring is to detect vibrations that are caused by external excitation or faults. Vertical Vibration Model for Unsteady Lubrication in Rolls . The cold rolling process is a ...

More

Experimental Investigation on Dynamic Characteristics of a

Serpentine belt is widely used in the front end accessory drive (FEAD) system of automotive engine. Experimental setup and dynamic behaviors of a FEAD system are demonstrated in this paper. Some dynamic characteristics are investigated, subjected to multifrequency excitations and different crankshaft (CRK) loads. Experimental results show that the parametric instability of belt transverse ...

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