湖南农业大学学报（自然科学版）2023，Vol.49Issue(6)：737-742,6.DOI:10.13331/j.cnki.jhau.2023.06.016
旋耕机组对拖拉机半主动座椅非线性振动的影响
Influence of rotary tiller group on nonlinear vibration of tractor semi-active seat
摘要
Abstract
In order to comprehend the influence of rotary tiller group on the vibration characteristics of tractor seat in transport and working state,the vibration model of the tractor system with 3 freedom degrees were established in the vertical plane.The vibration simulation of Dongfanghong MG654 tractor suspened 2BYL-4 rapeseed rototiller system was carried out with Matlab/SIMULINK to obtain the minimum air spring pressure value and the current value of Mr Damper when the root mean square of seat weighted acceleration was the smallest.The simulation results show that the smallest value of the seat weighted acceleration root mean square is 0.629 m/s2 when the air pressure is 5 bar and the current is 0.650 A in transport state,and the smallest value of the seat weighted acceleration root mean square is 0.520 m/s2 when the air pressure is 5 bar and the current is 0.250 A in working state.It shows that the root mean square value of the acceleration of the seat could be reduced by changing the air pressure of the seat air spring and the current of the Mr Damper,thus the driver's driving experience could be effectively improved.The experimental study was carried out when the seat weighted acceleration root-mean-square value was the lowest,and the seat nonlinear vibration test results were compared with the simulation results,and the maximum relative error was 6.40%.It can be seen that the established nonlinear model is reasonable.关键词
拖拉机/旋耕机组/半主动座椅/非线性振动/固有频率/加速度均方根值Key words
tractor/rotary tiller group/nonlinear vibration/natural frequency/the acceleration root mean square/semi-active seat分类
农业科技引用本文复制引用
魏刚,孙松林..旋耕机组对拖拉机半主动座椅非线性振动的影响[J].湖南农业大学学报（自然科学版）,2023,49(6):737-742,6.基金项目
湖南省科学技术厅项目(2018NK2061) （2018NK2061）
