CAJ | 학술논문

针对轧机振动传统的一维或二维的解析模式，给出1580 mm四辊轧机振动的三维(空间)振动解析模式及其振动特性-固有频率和振型。在四辊轧机振动解析中被忽略的“不得已”间隙，必须在辊系结构予以考虑。利用修正三维多物体传递矩阵法辅之有限元法对轧机轧辊进行包含3个位移3个转角6个自由度的三维振动数值解析。数值模拟结果显示，四辊轧机考虑阻尼作用后的固有频率(复频率虚部)与现场测试频率基本吻合；“不得已”间隙导致轧机系统出现危险低频率，且振型为含有水平、交叉及摇摆等包含多个单一振型的复合振型。
침대알궤진동전통적일유혹이유적해석모식，급출1580 mm사곤알궤진동적삼유(공간)진동해석모식급기진동특성-고유빈솔화진형。재사곤알궤진동해석중피홀략적“불득이”간극，필수재곤계결구여이고필。이용수정삼유다물체전체구진법보지유한원법대알궤알곤진행포함3개위이3개전각6개자유도적삼유진동수치해석。수치모의결과현시，사곤알궤고필조니작용후적고유빈솔(복빈솔허부)여현장측시빈솔기본문합；“불득이”간극도치알궤계통출현위험저빈솔，차진형위함유수평、교차급요파등포함다개단일진형적복합진형。
For the traditional one-dimensional or two-dimensional analysis mode of the rolling mill vibration, the three-dimensional (spatial) vibration analysis mode and its vibration characteristics (vibration frequency and mode shape) of the 1 580 mm 4-h plate rolling mill are given. The required clearance in the roll system structure should be considered during the mill vibration analysis. The modified three-dimensional multi-body transfer matrix method (MTM-TMM) and the finite element method (FEM) are used to complete the three-dimensional vibration (6 degrees of freedom -3 linear displacements and 3 angular displacements) numerical analysis of the rolls. The vibration frequencies obtained in numerical simulation demonstrate that the frequency (imaginary part of complex frequency) of the 4-h mill basically agree with that measured in the field test. The required clearance leads to the appearance of dangerous low frequencies. The mode shape is a complex mode shape that is composed of some single mode shape of the horizontal, cross and swinging vibration.