CAJ | 학술논문

为了降低西南地区广泛应用的微耕机扶手处的振动,得到扶手的振动特性至关重要.为此,在UG中建立了扶手的三维模型,应用ANSYS软件和LMS test.lab系统分析了扶手的自由模态和试验模态,分别得到了扶手前6阶固有频率及振型,通过对比可知两者振型一致,频率的平均相对误差为4.24%,仿真结果的精度满足要求.进而,分析了扶手的约束模态,得到了其前6阶模态值,前4阶频率分别为13.02、17.22、28.57、77.88Hz;1 阶振型是Y轴的横向振动,2阶振型是Z轴的上下振动,3阶固有频率处发生了扭转振动,4阶振型是Z轴的弯曲振动;各阶振型在扶手与人手接触处的位移量最大.
위료강저서남지구엄범응용적미경궤부수처적진동,득도부수적진동특성지관중요.위차,재UG중건립료부수적삼유모형,응용ANSYS연건화LMS test.lab계통분석료부수적자유모태화시험모태,분별득도료부수전6계고유빈솔급진형,통과대비가지량자진형일치,빈솔적평균상대오차위4.24%,방진결과적정도만족요구.진이,분석료부수적약속모태,득도료기전6계모태치,전4계빈솔분별위13.02、17.22、28.57、77.88Hz;1 계진형시Y축적횡향진동,2계진형시Z축적상하진동,3계고유빈솔처발생료뉴전진동,4계진형시Z축적만곡진동;각계진형재부수여인수접촉처적위이량최대.
In order to reduce the vibration of the mini-tiller used widely in Southwest area, it' s essential to obtain the vibration characteristics of the armrest.For this purpose the three-dimensional model of armrest was established using UG, ANSYS software and LMS test.lab system were applied to analyze the free modal and test modal of armrest and the natural frequencies and modal shapes of top six order were obtained respectively.The both modal shapes are unanimously and the average relative error of frequency was 4.24%.The accuracy of simulation results meets the requirements.Fur-thermore, the constraint modal of armrests was analyzed, and the modes of top ten order were obtained.The results showed that the frequencies of top four order is 13.02Hz, 17.22Hz, 28.57Hz and 77.88Hz;the shape of first order is transverse vibration along the Y-axis; the second order is vertical vibration along Z-axis;torsional vibration occurred at the third natural frequency;the fourth order is bending vibration along Z axis, the displacement of modal shapes reach maximum at the contact between the armrest and the staff.