撞击载荷下充液双层结构响应特性的试验研究

张琳; 张涛; 刘土光; 郑浩

doi:10.11883/bzycj-2019-0094

撞击载荷下充液双层结构响应特性的试验研究

doi: 10.11883/bzycj-2019-0094

华中科技大学船舶与海洋工程学院，湖北武汉 430074

基金项目: 国家自然科学基金（10702022）

详细信息

作者简介:
张　琳（1993－　），男，硕士，zhanglin120121@163.com

通讯作者:
张　涛（1976－　），男，博士，副教授，zhangt7666@hust.edu.cn

中图分类号: O342
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- 文章访问数: 5099
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- 被引次数: 4
出版历程
- 收稿日期: 2019-03-27
- 修回日期: 2019-07-03
- 网络出版日期: 2020-02-25
- 刊出日期: 2020-03-01

Experimental study on response characteristics of the water-filled double-layer structure under collision load

School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China

摘要

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。
- 充液双层板结构 /
- 碰撞试验 /
- 流固耦合 /
- 变形
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.
- water filled double-layer structure /
- collision test /
- fluid-solid coupling effect /
- deformation

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图 1 碰撞试验的力学模型

Figure 1. Mechanical model of collision test

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图 2 试验结构模型（单位：mm）

Figure 2. Test structure model (unit: mm)

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图 3 拉伸试件外形及材料的应力应变曲线

Figure 3. Shape of tensile specimen and stress-strain curve

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图 4 试验结构与传感器安装位置

Figure 4. Test structure and sensor mounting position

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图 5 撞击过程中的5个典型时刻

Figure 5. Five typical moments during the collision

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图 6 顶板的最终变形形状

Figure 6. Final deformations of the upper plate

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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

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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

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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

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图 10 扰动压力曲线

Figure 10. Evolutions of disturbance pressure

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图 11 底板位移时域曲线

Figure 11. Displcement history of the bottom plate

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图 12 底板动态位移

Figure 12. Dynamic displacement of the bottom plate

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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/ MPa
206	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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施引文献

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