Li Ning, Cao Zhongxi, Bao Wei, Lin Suixian, Zou Tao, Yan Mingming
School of Mechanical and Electrical Engineering, Guangzhou University, Guangzhou, 510000, People's Republic of China.
Enterprise Development and Innovation Center, Guangzhou Guangri Elevator Industry Co., Ltd., Guangzhou, 510000, People's Republic of China.
Sci Rep. 2024 Feb 28;14(1):4825. doi: 10.1038/s41598-024-55175-6.
The performance of the heavy-duty escalator truss greatly affects the stability and service life of the whole escalator system, and the manufacturing cost of truss structure accounts for more than 1/5. Thus, how to design the truss structure reasonably is a pivotal issue drawing the attention of numerous engineers and researchers. In this work, the experimental research of heavy-duty escalators under full load conditions were performed in terms of the end restraints, the docking port clearances, and the deflection. Based on the experimental results, the three-dimensional simulation model of truss structure was created, and the influences of various factors such as the internal chamfer of truss member, the lower deviation of truss member, the dead weight of escalator, and the pretension force of each bolt at the docking port were analyzed and quantified. Finally, the finite element model which can almost completely characterize the actual structure was obtained with slight difference. The conclusions drawn in this work provide the basis for the efficient design, correct simulation, low cost production and rapid installation of the heavy-duty escalator truss.
重载自动扶梯桁架的性能对整个自动扶梯系统的稳定性和使用寿命有很大影响，且桁架结构的制造成本占比超过五分之一。因此，如何合理设计桁架结构是一个引起众多工程师和研究人员关注的关键问题。在这项工作中，针对重载自动扶梯在满载工况下的端部约束、对接端口间隙和挠度进行了试验研究。基于试验结果，建立了桁架结构的三维仿真模型，并对桁架构件内倒角、桁架构件下偏差、自动扶梯自重以及对接端口各螺栓预紧力等多种因素的影响进行了分析和量化。最后，得到了与实际结构几乎完全一致、仅有微小差异的有限元模型。这项工作得出的结论为重载自动扶梯桁架的高效设计、正确仿真、低成本制造和快速安装提供了依据。
