中国机械工程
中國機械工程
중국궤계공정
CHINA MECHANICAl ENGINEERING
2014年
17期
2344-2350
,共7页
刘彬%赵红旭%朱月%刘浩然%侯东晓
劉彬%趙紅旭%硃月%劉浩然%侯東曉
류빈%조홍욱%주월%류호연%후동효
冷轧机%两自由度%垂直振动%动态轧制力
冷軋機%兩自由度%垂直振動%動態軋製力
랭알궤%량자유도%수직진동%동태알제력
cold rolling mill%two-degree-of-freedom%vertical vibration%dynamic rolling force
考虑冷轧机轧辊在垂直方向上振动位移动态变化的影响,建立了一种动态轧制力模型,在此基础上考虑轧机机械结构振动的影响,推导出含有动态轧制力的轧机辊系两自由度非线性垂直振动方程,采用多尺度法求解该系统的主共振及内共振幅频特性方程。对轧机实际参数进行仿真,分析了轧机中非线性刚度、阻尼、外扰力等参数变化时的轧机主共振幅频特性以及内共振幅频特性,并研究了轧机工作辊与支承辊的动态分岔特性,发现随着外扰力的变化,轧机辊系均会出现周期、倍周期、混沌运动等一系列复杂的运动状态,并得到了各轧辊出现不同运动状态的条件,为研究抑制轧机振动问题提供了有效的理论参考。
攷慮冷軋機軋輥在垂直方嚮上振動位移動態變化的影響,建立瞭一種動態軋製力模型,在此基礎上攷慮軋機機械結構振動的影響,推導齣含有動態軋製力的軋機輥繫兩自由度非線性垂直振動方程,採用多呎度法求解該繫統的主共振及內共振幅頻特性方程。對軋機實際參數進行倣真,分析瞭軋機中非線性剛度、阻尼、外擾力等參數變化時的軋機主共振幅頻特性以及內共振幅頻特性,併研究瞭軋機工作輥與支承輥的動態分岔特性,髮現隨著外擾力的變化,軋機輥繫均會齣現週期、倍週期、混沌運動等一繫列複雜的運動狀態,併得到瞭各軋輥齣現不同運動狀態的條件,為研究抑製軋機振動問題提供瞭有效的理論參攷。
고필랭알궤알곤재수직방향상진동위이동태변화적영향,건립료일충동태알제력모형,재차기출상고필알궤궤계결구진동적영향,추도출함유동태알제력적알궤곤계량자유도비선성수직진동방정,채용다척도법구해해계통적주공진급내공진폭빈특성방정。대알궤실제삼수진행방진,분석료알궤중비선성강도、조니、외우력등삼수변화시적알궤주공진폭빈특성이급내공진폭빈특성,병연구료알궤공작곤여지승곤적동태분차특성,발현수착외우력적변화,알궤곤계균회출현주기、배주기、혼돈운동등일계렬복잡적운동상태,병득도료각알곤출현불동운동상태적조건,위연구억제알궤진동문제제공료유효적이론삼고。
The Establishment of dynamic force model was based on the consideration of the dy-namic changes of vibration displacement of cold rolling mill roller in vertical direction.The vibration influences of rolling mill's of the mechanical structure were considered,which formed the two-degree-of-freedom nonlinear vertical vibration equation.In addition,by using the multi-scale method, it was able to solve out the primary resonance and internal resonance amplitude-frequency characteris-tic equation of system.Lastly,parameters of the actual mill were used to conduct a simulation re-search and parameters such as equivalent nonlinear stiffness of a mill system,damping,and extrane-ous force were analyzed how to affect the primary and internal resonance.The study of the character-istics of work roll and back up roll was carried out and found that as the changes of the external dis-turbance force,the rolling mill will cause periodic,period-doubling,chaotic motion and a series of complex movements.The conditions where different kinds of motions occurred are also found.As a results it provides an effective theory reference for the research of inhibition of rolling mill vibration problems.