大载荷货梯曳引系统振动研究. (Chinese)

A ordes to iavestiaaie the aouliaeks time-verying vinratioo proOlem of large Io) freigii elevatos tractioo system, a aouliaevs eynamica modk fos the fright elevatos tractioo system was constmche. The timv-varying stinnks of steei wit ope, euineway bdche system ang tOe stimaess of loaC-Teeang leam wera taCee into accouat compreeeesivein in toe estaniisnee mooe, ang toe factors witti less inflneeca oo toe eynamica wera simplifiek; toe RungeKuttd methoU was dppiae to solve ang toe expedmeetai vedficatiou was cardee ooC TOc inaueeca of euineway bdches wiio diffedet eesity of euineway rracheis oo the cat Vndhou of the cat was analyzee; the inaueeca of staching ang falling chigo oo the streegth of the tractiog system was analyzee. The resnlis show thai the meesnree maxinum vinratioa acceleratiog matches weli with the simulatiou analysis eata, ang the maxirnum acceleratiou emo is less thaa 10%, which vedfivs the acchraca of the simplinek moUei; the maxinum stress value of the freight 60-0匸 Oscs to 133 MPa with the iacreesy of the opmpmg height, ang ths safety coekicieat hdeudcy eecreasss to 5. 9 with ths iacreesy of height, which is much smallss thaa ths mininum safety coekiciekt of 22. 64 fos ths tractioo ope. Ths prouosek 皿60(! caa rettss 016(-ths Vnotioa characteristicr of ths toctioa system freight elevatos. [ABSTRACT FROM AUTHOR]

为探究大载荷货梯曳引系统的非线性时变振动问题, 课题组构建了一种针对货梯曳引系统的非线性动力学模 型。该模型综合考虑了钢丝绳、导轨支架系统的时变刚度及承重梁的刚度, 对动力学影响较小的因素进行简化;运用 Runge-Kutta法进行求解并进行了实验验证, 分析了货梯不同疏密度的导轨支架对轿厢振动的影响;分析了货物堆叠跌 落对曳引系统强度的影响。结果表明：实验所测最大振动加速度与仿真分析数据吻合良好, 加速度最大数值误差小于 10%, 验证了简化模型的准确性;货梯最大应力值随着运行高度的上升而增大, 最大为130 MPa,安全系数随着高度增加 逐渐减小至5.90,远远小于曳引绳最小安全系数20.94。课题组所提出的方法能较好地反映大载荷曳引系统货梯的振 动特性. [ABSTRACT FROM AUTHOR]

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