Experimental study on response characteristics of the water-filled double-layer structure under collision load
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摘要: 为研究充液双层结构在碰撞过程的动力响应特性，对简化的双层板结构开展了系列碰撞试验，并对比了在有无充水条件下被撞结构的动态响应。研究结果显示，液体在碰撞过程中对顶板的缓冲和保护作用。最后通过分析有无充水条件下撞头加速度和内部扰动压力等试验数据，研究了充水与结构的流固耦合效应对碰撞响应的影响。Abstract: To investigate the dynamic response characteristics of the water-filled double layer structure when encountering a collision load, a series of collision tests are conducted and the response of the structure filled with water and unfilled with water is compared. The results indicate that the internal water can protect the upper plate during a collision. Finally, the effect of fluid-solid coupling between internal water and double layer structure on the collision response is investigated by analyzing the test data of the acceleration of the striker and the disturbance pressure of the internal water.
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图 7 不同碰撞速度下的撞头垂向加速度曲线
Figure 7. Vertical acceleration curves of the striker at various collision velocities
图 8 撞头垂向加速度曲线的频谱图
Figure 8. Spectra of the vertical acceleration curves of the striker
图 9 不同顶板厚度条件下撞头的垂向加速度曲线
Figure 9. Vertical acceleration evolutions of the striker under various upper plate’s thickness conditions
表 1 材料的力学性能
Table 1. Mechanical properties of material
杨氏模量/
GPa泊松比 密度/
(kg∙m−3)屈服强度/
MPa极限抗拉强度/
MPa206 0.3 7.86×103 365.00 484.37 
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表 2 试验工况
Table 2. Test description
工况描述 碰撞速度/(m∙s−1) 顶板厚度/mm 充水状态 n-3.44-8.45 8.45 3.44 空筒 w-3.44-8.45 8.45 3.44 满水 n-2.06-4.36 4.36 2.06 空筒 n-2.06-8.45 8.45 2.06 空筒 n-2.06-11.47 11.47 2.06 空筒 w-2.06-4.36 4.36 2.06 满水 w-2.06-8.45 8.45 2.06 满水 w-2.06-11.47 11.47 2.06 满水
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表 3 顶板最终变形统计
Table 3. Summary of final deformation of the upper plate
工况描述 顶板最终变形/mm 顶板最终变形减小比例/% 工况描述 顶板最终变形/mm 顶板最终变形减小比例/% n-3.44-8.45 23.81 − n-2.06-8.45 37.32 − w-3.44-8.45 18.95 20.41 w-2.06-8.45 25.33 32.13 n-2.06-4.36 15.96 − n-2.06-11.47 51.87 − w-2.06-4.36 13.42 15.91 w-2.06-11.47 31.13 39.98
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