城市曲面应急防洪屏结构优化研究∗

Structure Optimization of Curved Urban Emergency Floodcontrol Barriers

摘要:

研发新型防洪抢险装备，对于防御城市洪涝灾害，保障城市生命线安全具有重要的意义。采用数值仿真模拟的方法，分析了城市曲面应急防洪屏（以下简称“防洪屏”）曲面拱度对结构受力特性的影响，进一步对防洪屏的结构体型进行了优化研究。结果表明：在同一挡水工况下，随着曲面拱度的增大，防洪屏在同一挡水条件下，所承受的应力逐渐减小，变形明显改善；根据计算结果提出了优化方案，优化的新体型防洪屏在水深小于0.8 m，流速小于1.0 m/s 挡水工况下，结构最大应力小于材料特性指标安全极限阈值，满足挡水安全稳定要求，可以作为定型装备推广应用。研究成果为城市曲面应急防洪屏的优化设计提供了重要参考依据。

Abstract:

The development of innovative flood-retaining equipment is crucial for defending against urbanflood disasters and ensuring the safety of urban lifelines. Using numerical simulation methods, thisstudy investigates the impact of the curvature of curved urban emergency flood-control barriers ontheir structural stress characteristics and further optimizes the barrier structure. The results indicatethat under the same water-blocking conditions, as the curvature of the barriers increases, the stressthey endure gradually decreases, and their deformation significantly improves. Building on these findings,an optimization scheme was proposed. The proposed optimized scheme met operational conditionsunder water depths less than 0.8 m and flow velocities less than 1.0 m/s. Under these conditions,the structural stress remained below the yield stress of the materials, meeting the requirementsfor safe and stable water-blocking. These findings provide a valuable reference for the optimized designof curved urban emergency flood-control barriers.