基于Kriging代理模型的新型箱梁气动外形优化

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振动与冲击 ›› 2025, Vol. 44 ›› Issue (10) : 58-65.

振动理论与交叉研究

基于Kriging代理模型的新型箱梁气动外形优化

白桦*1，叶茂2，杨光1，高广中1

作者信息 +

Aerodynamic shape optimization of a new box girder based on the Kriging surrogate model

BAI Hua*1，YE Mao2，YANG Guang1，GAO Guangzhong1

Author information +

文章历史 +

摘要

为解决传统的桥梁断面气动措施优化方法优化效率低下且搜索范围有限等缺点，提出了一种由风洞试验驱动，将Kriging代理模型和多点搜索策略相结合的主梁断面气动外形优化方法，对2000m级悬索桥新型箱梁断面在倒L型导流板的水平板宽度L、下中央稳定板高度H和检修车轨道位置J构成的多参数设计空间内的气动外形进行优化。首先使用改进拉丁超立方试验设计方法获取设计空间内的初始样本点，通过风洞试验获得初始样本的颤振临界风速；然后建立设计参数和颤振临界风速的初始Kriging代理模型；接着使用新提出的并行加点准则添加更新点更新代理模型。最终优化获得了颤振性能最佳断面匹配的设计参数，通过风洞试验验证了优化结果的正确性。结果表明：Kriging代理模型结合多点搜索策略对桥梁断面气动外形进行优化，显著提高了优化效率；最优断面的颤振临界风速比原断面提高了51%，比单独设置倒L型导流板时提高了13%；倒L型导流板的水平板宽度L对颤振性能影响程度最为显著。

Abstract

In order to solve the shortcomings of low optimization efficiency and limited search range of traditional aerodynamic measures optimization methods for bridge sections, a wind tunnel test-driven aerodynamic shape optimization method for main girder sections is proposed, which combines Kriging surrogate model and multi-point search strategy. The aerodynamic shape of the new box girder section of the 2000 m suspension bridge is optimized in the multi-parameter design space composed of the horizontal plate width L of the inverted L-shaped deflector, the height H of the lower central stabilizer and the track position J of the maintenance vehicle. Firstly, the improved Latin hypercube experimental design method is used to obtain the initial sample points in the design space, and the flutter critical wind speed of the initial sample is obtained by wind tunnel test. Then, the initial Kriging surrogate model of design parameters and flutter critical wind speed is established. Then, the update point update proxy model is added using the newly proposed parallel add-point criterion. Finally, the design parameters of the best section matching of flutter performance are obtained by optimization, and the correctness of the optimization results is verified by wind tunnel test. The results show that the Kriging surrogate model combined with the multi-point search strategy optimizes the aerodynamic shape of the bridge section, which significantly improves the optimization efficiency. The flutter critical wind speed of the optimal section is 51 % higher than that of the original section, and 13 % higher than that of the inverted L-shaped baffle alone. The horizontal plate width L of the inverted L-shaped deflector has the most significant influence on the flutter performance.

导出引用

白桦1, 叶茂2, 杨光1, 高广中1. 基于Kriging代理模型的新型箱梁气动外形优化[J]. 振动与冲击, 2025, 44(10): 58-65

BAI Hua1, YE Mao2, YANG Guang1, GAO Guangzhong1. Aerodynamic shape optimization of a new box girder based on the Kriging surrogate model[J]. Journal of Vibration and Shock, 2025, 44(10): 58-65

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