| 周晗.大载荷货梯曳引系统振动研究[J].轻工机械,2022,40(5):43-52 |
| 大载荷货梯曳引系统振动研究 |
| Vibration Study of Traction System of Large Load Freight Elevator |
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| DOI：10.3969/j.issn.1005 2895.2022.05.007 |
| 中文关键词: 振动 曳引系统 非线性 变刚度 Runge Kutta法 |
| 英文关键词:vibration traction system nonlinear variable stiffness Runge Kutta method |
| 基金项目:国家自然科学基金资助项目：基于振动和波动特性融合的电梯钢丝绳曳引系统多故障诊断方法研究（52075496）；NSFC 浙江两化融合联合基金项目：电梯全寿命周期故障预测与智能健康管理方法研究（U1709210）。[ZK)] |
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| 中文摘要: |
| 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。 |
| 英文摘要: |
| In order to investigate the nonlinear time varying vibration problem of large load freight elevator traction system, a nonlinear dynamics model for the freight elevator traction system was constructed. The time varying stiffness of steel wire rope, guideway bracket system and the stiffness of load bearing beam were taken into account comprehensively in the established model, and the factors with less influence on the dynamics were simplified; the Runge Kutta method was applied to solve and the experimental verification was carried out.The influence of guideway brackets with different density of guideway brackets on the car vibration of the car was analyzed; the influence of stacking and falling cargo on the strength of the traction system was analyzed.The results show that the measured maximum vibration acceleration matches well with the simulation analysis data, and the maximum acceleration error is less than 10%, which verifies the accuracy of the simplified model; the maximum stress value of the freight elevator rises to 130 MPa with the increase of the operating height, and the safety coefficient gradually decreases to 5.9 with the increase of height, which is much smaller than the minimum safety coefficient of 20.94 for the traction rope. The proposed method can better reflect the vibration characteristics of the traction system freight elevator. |
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