| 摘要: |
| 目的 针对桁架式桥梁在实际载重情况下的抗震性能问题,提出了基于正交试验法的桁架式桥梁模型优化
框架,得出了桥梁快速经济合理的设计方法。 方法 基于传统桥梁模型,首先,该方法建立了简化的桁架式桥梁有限
元模型,并选取桥面宽度、桥面厚度和建造材料作为试验因素,设计了三因素三水平的正交数值模拟试验。 其次,
对有限元仿真结果的各项数据进行方差分析和回归分析,研究了各桥梁构造参数对抗震性能指标的敏感性。 最后
通过静力学和动力学分析,验证了优化后桥梁模型的准确性。 结果 在对正交试验数据进行方差分析和回归分析后
表明:桥面宽度对最大应力的影响程度最为显著,其次为桥面厚度,而材料密度的影响较为次要。 通过有限元计算
分析了在受力状态下的结构变形和桥梁结构的振动特性,验证了桥梁结构在受力和振动方面的结构可行性。 结论
正交试验法与仿真软件的结合应用能够快速而有效地了解各因素对桥梁性能的影响,同时为桁架结构抗震性能提
升提供了理论依据,有望促进桥梁高效设计和优化方法提升。 |
| 关键词: 桁架式桥梁 正交数值模拟试验 方差分析 抗震性能指标 |
| DOI： |
| 分类号: |
| 基金项目: |
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| Research on Performance of Truss Bridge Model Based on Orthogonal Test Method |
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GE Zhirong
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School of Mechanical Engineering University of Shanghai for Science and Technology Shanghai 200093 China
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| Abstract: |
| Objective Aiming at the seismic performance of truss bridges under the actual load the optimization
framework of the truss bridge model based on the orthogonal test method is put forward and the fast economical and
reasonable design method for bridges is obtained. Methods Starting from the conventional bridge model this method first
establishes a simplified finite element model of a truss bridge. Bridge deck width bridge deck thickness and construction
materials are selected as experimental factors and a three-factor three-level orthogonal numerical simulation experiment is
designed. Secondly the variance analysis and regression analysis of the data of the finite element simulation results are
carried out to study the sensitivity of the bridge structural parameters to the seismic performance index. Finally the
accuracy of the optimized bridge model is verified by static and dynamic analysis. Results After the variance analysis and
regression analysis of the orthogonal test data the results show that the width of the bridge deck has the most significant
effect on the maximum stress followed by the thickness of the bridge deck while the density of the material has a minor
effect. Through the finite element calculation structural deformations under stress and the vibration characteristics of
bridge structures are analyzed and the structural feasibility of the bridge structure under stress and vibration is verified.
Conclusion The combined application of the orthogonal test method and simulation software enables a rapid and effective
understanding of the impact of various factors on bridge performance. This approach also provides a theoretical basis for
enhancing the seismic performance of truss structures potentially promoting efficient bridge design and optimization
methods. |
| Key words: truss bridge orthogonal numerical simulation test variance analysis seismic performance index |
