流固耦合楔形体低速入水应变验证

流固耦合楔形体低速入水验证

仿真设置 

几何建模和材料见文献，通过提取对应位置的应力与试验数据（入水速度2m/s）进行对比。wechat1 cheaper

结果

楔形体应变发生在最大入水时刻，仿真数据与试验数据误差4%，且入水过程0.01s内应变与试验数据趋势变化一致。验证了STARCCM&ABAQUS协同计算的有效性。

1.对比了数值与试验应变时历曲线。

2.最大应变对比：误差<4%

误差分析：0.012s后与试验数据出现较大变化的原因是试验中通过装置控制了楔形体入水速度，初始时刻一致较为容易实现，但入水仿真过程较难实现。见文献：

The dimensions of the test tank are L = 6m, B = 1.5m and Hmax = 0.75m. All measurements

were performed at a water depth of 0.55m. The air and water temperature was T = 19°C.

Tests with increased and decreased water level did not show a significant variation of the results, Figure 5. To avoid vibrations of the test rig due to large initial accelerations, the traversing unit was accelerated as smoothly as possible. This was achieved by adjusting the vertical acceleration using the following formula:h [m] denotes the vertical way between the undisturbed water surface and the bottom of the

test body, a [m/s²] the rig acceleration and v [m/s] the target impact velocity. The factor 1.1

indicates a safety margin to reach the impact velocity in time.