Lightweight Design of Composite Evacuation Platform Based on Response Surface Method
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摘要: 在城市轨道交通中,疏散平台是在列车故障或其他异常情况下能够确保迅速、有序地从隧道内组织乘客尽快疏散至安全区域必备的安全通道。复合材料具备轻质、高强、可设计性强和防火等优异性能,因此被逐步应用于疏散平台上。鉴于工程应用中对复合材料轻量化要求的不断提高,在满足材料强度和结构变形的基础上,达到减轻结构质量的目的,本研究根据现有的复合材料疏散平台,对其变形和强度进行了分析,据此定义优化变量,以其质量、强度和整体变形为目标函数,基于响应面法多目标寻优思想,探讨了目标函数和优化指标的函数关系,经比较选出合适的方案,并对选取的方案做了进一步的验证。结果表明,结构优化后复合材料疏散平台在保证强度和整体变形的情况下,质量显著减少。Abstract: In urban rail transit, evacuation platform is a necessary safety passage which can ensure the rapid and orderly evacuation of passengers from the tunnel to the safety area as soon as possible in the case of train failure or other abnormal conditions. Composite materials of light weight, high strength, strong designability and fire prevention have been gradually applied to evacuation platform. In view of the continuous improvement of the lightweight requirements for composite materials in engineering applications, the purpose of reducing the structural weight is achieved on the basis of meeting the material strength and structural deformation. In this study, the deformation and strength of the existing composite evacuation platform are analyzed, and optimization variables are defined. With its mass, strength and overall deformation as the objective function and the multi-objective optimization based on response surface method idea, the function relationship between the objective function and the optimization index is discussed. The appropriate solution is obtained by comparison, and the selected solution is further verified.Resultsshow that when the strength and the overall deformation of the optimized evacuation platform are guaranteed, its weight decreases.
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