Research On Hydrodynamic Responses Under Slamming When Complex Structure Encounters Water

Integration of regional economy, the rising of marine economy, the vigorouslydevelopment of urbanization, has become China’s overall economic situation in the future fora long period of time, it still will be the inevitable choice of the national economy. In such alarge economic pattern and the overall trend, the country continued to build across-river, evencross-sea bridge, the construction of port, water platform also come and go. At the same time,a large number of construction projects, plus a variety of factors, such as the outdatedinfrastructure and the risks of engineering construction in original wave of economicdevelopment, resulting in the recent years there have been many engineering problems, suchas the bridge collapsed caused by boat impact, falling water platform lifting structures, etc.,on the one hand, while strengthening management, how to right evaluate the slamming effectof the structure falling into the water, is a pressing issue. In addition, people will turn theirattention to the vast ocean at the time, the development of wave energy as the representativeof ocean energy gradually into everyone’s view, as well as ocean buoys in the water earlyhydrological observations, etc., such marine structures in waves slamming circumstances,how it affects their anchoring devices, how to conduct safe, efficient, simple and convenientmooring positioning also is a very interesting topic.For these structures fall slamming into the water issues, and stability mooringpositioning waves on marine structures slamming its mooring system, the paper have beenstudied the problem of the water pressure changes of the slamming waters and wave makingeffect of hydraulic structures fall into the water by numerical simulation method, and in thelast, the mooring system stability caused by waves slamming marine structures, is analyzed tocalculate. The main contents and conclusions:Organizing, digesting, absorbing the domestic and overseas water entry slamming theory,to the new emerging slam issues, a detailed analysis and discusses the damping processdetailed of the structure falling in the air, and the influence of concave structures whereaboutsand slamming pre-impact air cushion were devoted.Discussed physical model tests of two different wave making causing by the wedge, flatstructures slamming into the water, with dimensional analysis theory to explain theimportance of the physical mechanism of the test before the test requires a detailed analysis,combined with the similarity theory discuss the similarity criterion in structures slamminginto the water tests involved.Aimed at the real environmental background, some typical conditions were simulated here, especially the concave body slamming process was animated and digital-analog study.Wave and pressure changes caused by different attitude slamming into the water were studied,and come up with the comparison of different wave making mechanism in one experiment.The effects of air-cushion were better research when the structure slamming into water,demonstrates the cushion action on slamming from the perspective of numerical simulation,which was the useful exploration for a better understanding of the air cushion;Studied the stability of anchor locating system for floating cylindrical wave energyconverter, ocean buoys of hydrological observations and other marine structures slammed bywave.The results show that, by means of numerical simulation, the different wave makingmechanism to same structure slamming into the water is a useful attempt, and got quiteinteresting conclusions; additionally, for the concave structures slamming process, the aircushion has a very important influence; study on the stability of the mooring system of oceanstructures impact by wave deserves attention to corresponding engineering researchers.