Abstract: Many surface ships are equipped with trunk structures to suspend the special equipment such as sonar and diving systems. The wall sat the trailing edge of the trunk will be impacted by the shear layer at the bottom of the trunk, while the fluid inside the trunk will slosh violently under the excitation of the external currents and waves during the ship navigation. Large slamming loads will be generated on the inner wall of the trunk by the sloshing motion of fluid. Aiming at this problem, the experimental tests are carried out to study the impact of the shear layer and the load of the fluid sloshing in the trunk. It carries out the analysis of the variation of the shear layer impact and fluid sloshing loads with the parameters such as the flow velocity and the opening form of the trunk. The regions with larger fluid sloshing loads are determined by comparing the test results at the different measuring locations in the trunk, which can provide guidance for the design of the trunk structure.

Key words: trunk, sloshing, shear layer, load

摘要： 很多水面舰船为吊放声呐、潜水系统等特殊设备,设置了围阱结构。舰船航行过程中,围阱随边的壁面将受到底部剪切层的冲击,且围阱内的流体在外部来流和波浪的激励下将发生剧烈晃荡,流体的晃荡运动会对围阱内壁面产生较大的砰击载荷。针对该问题,开展了模型试验,对围阱内剪切层冲击及流体晃荡的载荷进行研究,分析剪切层冲击及流体振荡载荷随流速、围阱开口形式等参数的变化规律,通过对比围阱内不同位置测点的测试结果,确定流体晃荡载荷较大的区域,指导围阱结构设计。

关键词: 围阱, 晃荡, 剪切层, 载荷