在多个桥梁联动桥系统中,对水力动力学的三维大模拟
Weiqun Liang1, Xiaobin Chen2, Lubo Tang1
1School of Civil Engineering, Central South University, Changsha, 410083, China.
Scientific reports
|December 31, 2025
概括
大模拟 (LES) 揭示了双重桥梁如何影响下游流量. 通过详细描述不同条件下的压力,速度和动力学,研究结果为结构安全提供了信息.
科学领域:
- 流体动力学 流体动力学
- 水力动力学就是水力动力学.
- 结构工程是结构工程.
背景情况:
- 来自双重桥梁支柱的唤醒流会导致复杂的水力动力学相互作用.
- 这些相互作用会影响桥梁结构的安全性和耐用性.
- 了解这些现象对于有效的桥梁设计和维护至关重要.
研究的目的:
- 为了研究双重桥梁支柱的3D水力动力学特征.
- 分析不同流速,间距比率和码头数量的影响.
- 为桥梁监测和保护战略提供理论支持.
主要方法:
- 采用大模拟 (LES) 进行详细的流场分析.
- 模拟了八个相等距离的合桥梁支柱.
- 各种流速 (0.5-1.5米/秒),间距比率 (1.5-3.5),以及码头号码 (2-10).
主要成果:
- 压力下游下降;下游的码头压力极端偏移横向.
- 观察到不对称的速度分布和不断演变的结构.
- 升力系数周期性波动;阻力系数显示复杂的变化,包括负阻力.
- 下游的流流出频率下降,导致多频共振.
- 增加的流速稳定了提升反应,并转移了上游的流.
- 较大的间距比率减少干扰,并增强上游流流失频率.
- 增加码头数量可以提高稳定性,减少峰值提升,减少负阻力.
结论:
- 水力动力学特征对流速,间距比率和码头数非常敏感.
- 结果提供了关于动力学,压力分布和力波动的见解.
- 结果为提高桥梁结构的安全性和耐用性提供了理论基础.
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