基于流固耦合作用的水下夯锤选型优化研究OA
Study on selection optimization of underwater tamper based on fluid-structure interaction
本文采用LS-DYNA动力学有限元方法,分析圆柱形和圆台形两种典型水下夯锤的流体动力学特性及其绕流阻力变化规律.模拟结果表明,在恒定静水压强条件下,夯锤质量与运动参数呈现显著相关性;当夯锤下落距离从2.5 m逐步增大时,圆柱和圆台形夯锤的最大动压力值随下落距离的变化而均呈现系统性增长,其中,圆台形夯锤在各测点压力变化梯度是圆柱形的1.3～1.5倍,而两种夯锤的夯沉量增幅呈现边际递减特性.随着夯锤尺寸倍数的增加,当夯锤尺寸倍数在2.5倍时,其夯击效能也逐步提高,其夯击效能递增幅度有所降低.研究结果可为水下夯击工程的夯锤选型设计提供量化参考.
This study adopts the LS-DYNA dynamic finite element method to analyze the hydrodynamic characteristics and flow drag variation laws of two typical underwater tampers:cylindrical and truncated-cone types.The simulation results demonstrate that,under constant hydrostatic pressure conditions,there is a significant correlation between the tamper mass and its motion parame ters.When the drop distance of the tamper increases gradually from 2.5 m,the maximum dynamic pressure values of both cylindrical and truncated-cone tampers increase systematically with the drop distance.Specifically,the pressure variation gradient at each monitoring point of the truncated-cone tamper is 1.3-1.5 times that of the cylindrical tamper,while the increment of penetration depth for both tampers presents a diminishing marginal characteristic.With the increase of the tamper size multiple,the tamping efficiency im proves progressively.However,when the tamper size multiple reaches 2.5 times,the increasing amplitude of the tamping efficiency decreases gradually.
蒋鹏飞
盘山县水利事务服务中心,辽宁 盘锦 12400
建筑与水利
水下夯锤结构优化计算流体动力学LS-DYNA数值模拟绕流阻力特性
underwater tamper structural optimizationcomputational fluid dynamicsLS-DYNA numerical simulationflow-induced drag characteristics
《东北水利水电》 2026 (4)
41-44,54,5
辽宁省农业科技攻关研发项目(20220615)
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