Abstract

To accurately explore the horizontal vibration response and aerodynamic load variation law of high-speed elevator with gas-solid interaction coupling in real environment, a mathematical and a three-dimensional calculation model of the coupling vibration of the shaft airflow and car body were established based on the arbitrary Lagrange-Euler method and the finite volume method. Additionally, the rationality of the coupling calculation model was verified by taking the working condition of 7 m/s as the test object. Then, the aerodynamic load and the horizontal vibration acceleration of the car body for different speed conditions were solved using unidirectional and bidirectional fluid-structure coupling numerical simulation methods, and the influences of the two coupling methods on the horizontal vibration response of the car body were compared and analyzed. The results showed that the aerodynamic load on the car body fluctuated greatly due to its horizontal vibration under the bidirectional coupling effect, and the peak value of the fluctuation was proportional to the second power of the running speed. When the running speed was greater than 7 m/s, the influence of the bidirectional coupling on the horizontal vibration of the car body became more prominent. The typical digital characteristics of the vibration acceleration increased by 129.70%–226.84%, and the maximum amplitude of the low-frequency vibration of the car body increased significantly. This study provides an effective method for the analysis of the gas-solid coupling characteristics of a high-speed elevator, and it provides theoretical guidance for the development of an optimal vibration damper for a high-speed elevator.

摘要

【摘要】：为准确探究真实环境下气固耦合高速电梯的水平振动响应和气动载荷变化规律,建立了井道气流与轿厢耦合振动的数学模型和三维计算模型。关于任意拉格朗日-欧拉法和有限体积法。此外，以7 m/s工况为试验对象，验证了耦合计算模型的合理性。然后，采用单向和双向流固耦合数值模拟方法求解不同速度条件下车体的气动载荷和水平振动加速度，并对比分析了两种耦合方式对车体水平振动响应的影响。结果表明，在双向耦合作用下，车体的水平振动导致车体气动载荷波动较大，波动峰值与行驶速度的二次方成正比。当运行速度大于7 m/s时，双向耦合对车体水平振动的影响更加突出。振动加速度的典型数字特性增加了129.70%～226.84%，车身低频振动的最大幅度明显增加。本研究为高速电梯气固耦合特性分析提供了一种有效的方法，