流固耦合楔形體低速入水驗證

仿真設(shè)置 

幾何建模和材料見文獻(xiàn)，通過提取對應(yīng)位置的應(yīng)力與試驗數(shù)據(jù)（入水速度2m/s）進(jìn)行對比。wechat1 cheaper

結(jié)果

楔形體應(yīng)變發(fā)生在最大入水時刻，仿真數(shù)據(jù)與試驗數(shù)據(jù)誤差4%，且入水過程0.01s內(nèi)應(yīng)變與試驗數(shù)據(jù)趨勢變化一致。驗證了STARCCM&ABAQUS協(xié)同計算的有效性。

1.對比了數(shù)值與試驗應(yīng)變時歷曲線。

2.最大應(yīng)變對比：誤差<4%

誤差分析：0.012s后與試驗數(shù)據(jù)出現(xiàn)較大變化的原因是試驗中通過裝置控制了楔形體入水速度，初始時刻一致較為容易實現(xiàn)，但入水仿真過程較難實現(xiàn)。見文獻(xiàn)：

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.