风浪流耦合作用下锚泊式海上试验平台的水动力特性试验

Hydrodynamic Characteristics Experimental of Anchored Offshore Test Platform under Wind Wave Current Coupling

为了研究国家海洋试验场的“国海试1”平台与锚泊优化方案是否满足设计要求,采用物理模型试验方法,制作1∶30试验平台模型,在国家海洋技术中心海洋动力环境实验室开展百余组不同波高、波周期、波向的不规则波、定常风和等效均匀流联合作用下,两点式躺地链系泊状态下的模型运动响应研究。对比分析试验结果与对应试验平台的设计指标,结果表明:同样海况下,风浪与潮流同向时,试验平台的运动响应更剧烈;流速1.14 m/s、4级海况时,试验平台最大横摇角为10.41°,“国海试1”平台无法开展正常的吊装工作;流速1.14m/s、6级海况时,试验平台最大横摇角为15.07°,“国海试1”平台搭载的试验测试设备无法正常工作;流速1.14 m/s、8级海况时,试验平台最大横摇角为20.21°,平台存在安全隐患,应采取避险措施;“国海试1”满足抗7级风浪的设计要求。该研究成果验证了改进后的国家海洋综合试验场“国海试1”平台满足抗7级海况的设计要求。因此,建议“国海试1”平台在6级海况下应停止试验作业,8级海况下应采取必要的避险措施。该研究为同类新型海洋平台水动力研究提供了参考。

In order to study whether the platform and anchoring optimization scheme of"National Sea Test 1"meet the design requirements,a 1:30 experimental platform model is developed using physical model testing methods to optimize the anchoring scheme of the"National Sea Test 1"platform at the National Marine Testing Ground.A study on the motion response of the model under two-point lying chain mooring state is conducted with the combined function of over a hundred sets of irregular waves,fixed length winds,and equivalent uniform currents with different wave heights,wave periods,and wave directions at the Marine Dynamic Environment Laboratory of the National Ocean Technology Center.The test results and corresponding design indicators of the test platform are analyzed.The results show that under the same sea conditions,when the wind and waves are in the same direction as the current,the motion response of the test platform is more severe.When the flow is 1.14 m/s and the sea condition is level 4,the maximum roll angle of the test platform is 10.41°,and the"National Sea Test 1"platform can't carry out normal lifting work;when the flow is 1.14 m/s and the sea conditions are level 6,the maximum roll angle of the test platform is 15.070,and the test equipment carried on the"National Sea Test 1"platform can't work properly;when the flow is 1.14 m/s and the sea condition is level 8,the maximum roll angle of the test platform is 20.21°.The experimental platform is unsafe,and the avoidance measures should be taken;the"National Sea Test 1"meets the design requirements for resistance to level 7 wind and waves.The research results have verified the indexes of the improved National Marine Comprehensive Test Site"National Sea Test 1I"platform.Therefore,it is recommended to stop the testing operation of the"National Sea Test 1"platform under level six sea conditions,and necessary risk avoidance measures should be taken under level eight sea conditions.The study provides a reference for the hydrodynamic research of similar new offshore platforms.