DR. PENG TAO STATE KEY LAB OF OCEAN ENGINEERING The sea conditions in the deep sea may not be something imaginable from the shore. Strong winds and rough waves. Deep sea waves can sometimes reach more than 20 meters in height. In this environment, marine equipment has to undergo severe tests, or it could lead to huge economic losses. For example, let's say something like an explosion and a fire that took place on the deep-sea horizon platform that occurred in the Gulf of Mexico several years ago. The disaster brought on by an incident costs much more in value than the achievements of the oil platform. What you are seeing is our country's first deepwater basin. It is also the deepest deepwater basin in the world. Simulating marine environmental conditions suffered by this equipment under laboratory conditions and using it to test the safety and reliability of the equipment entails a lot of scientific problems and key technologies.

DR. XIAO LONGFEI STATE KEY LAB OF OCEAN ENGINEERING So when actually doing so, we want to simulate the complex marine environment combined with wind, waves and currents at sea. From ripples, to tens of meters of waves, we have to simulate this. We can simulate waves with a height of up to 0.5 meters, which corresponds to an actual wave of up to 40 meters or 50 meters through the scaling ratio conversion. The actual ocean current divisions are complex. From the surface of the ocean to the deep sea. Its flow rate is not the same. Our lab uses a six-story flow system to simulate ocean currents. Therefore, our wind-making system, flow-making system, and wave-making system should be opened at the same time to simulate the coupling effect in the complicated marine environment.

DR. PENG TAO STATE KEY LAB OF OCEAN ENGINEERING Our design makes it possible to reduce the size of the equipment needed to test a scaled-down model. We put it in our pool to test whether this model can function properly in the sea where it will be deployed.

DR. XIAO LONGFEI STATE KEY LAB OF OCEAN ENGINEERING The best known model here is our country's first deepwater semi-submersible drilling rig, HYSY 981, a very famous name. Under harsh sea conditions, the platform will tilt significantly. More importantly, when a wave strikes a floating body, it will cause what we call wave climbing. The waves can climb and hit critical equipment on the deck. We need tests and analysis in the lab to provide a basis for the design.

DR. PENG TAO STATE KEY LAB OF OCEAN ENGINEERING It should be said that most of the ocean around the world can be simulated. Particularly sea areas for deep-sea oil and gas development can all be perfectly simulated in this basin.

DR. XIAO LONGFEI STATE KEY LAB OF OCEAN ENGINEERING At the beginning of the 21st century, the maximum depth of exploration of offshore oil and gas resources was within 3,000 meters. So when we built this basin, it was designed to simulate a water depth of 4,000 meters. Of course, with the development of offshore oil resources, the working depth will further deepen. I think, of course, we should not rule out the possibility to build larger experimental facilities in the future. But of course, on the other hand, we can also use existing research facilities to solve problems of deeper waters in the future. We are now developing the related technologies.