The invention discloses a large simulation test system for simulating combined effects of earthquakes, waves and ocean current, belonging to the technical field of a marine structure power test. The simulation test system comprises a test wave gutter channel, an absorption wave-maker device, a test water circulating device, an adjustable speed block platform, an earthquake simulation device, a two-way flow simulation device and a waterproof sealing device, wherein the upper plane of a vibration table body of the earthquake simulation device is parallel and level to the bottom plane of the test wave gutter channel; the waterproof sealing deice is arranged between the periphery of the upper plane of the vibration table body and the bottom plane of the test wave gutter channel; the absorption wave-maker device is arranged at the initial end of the test wave gutter channel; a flow making pump of the two-way flow simulation device is connected with an initial-end flow equalizing box and a tail-end flow equalizing box through a pipeline. The system is complete in test simulation function, different input excitation test conditions of the marine structure under combined effects of various loads can be simulated, the test simulation of the earthquakes, the waves and the ocean current is in full-digital control, and the large simulation test system is high in control accuracy and diverse in test function.

Large simulation test system for simulating combined effects of earthquakes, waves and ocean current

The invention discloses a physical model of a mooring ship and a test method of the physical model. The physical model of the mooring ship comprises a harbor basin, a wave generator, wave damping gentle slopes, an underground reservoir, a harbor model, a ship model, one or more submersible pumps, a guide wall, wind stands, cable models and a six-movement-quantity measuring apparatus, wherein the wave damping gentle slopes are arranged around the harbor basin; the underground reservoir is arranged under the ground of the harbor basin; the wave generator is arranged at one end of the harbor basin, and the harbor model and the ship model are arranged at the other end of the harbor basin; the guide wall is arranged at the periphery of the harbor model and the ship model; the wind stands are arranged on the ship model; the harbor model comprises dolphin piers, cable mooring piers, ship fender sensors, an iron stand and a computer; one ends of the cable models are connected with the harbor model, the other ends of the cable models are connected with the ship model, and a cable force sensor is arranged at the connecting end of the cable models and the ship model; the ship model is provided with a probe and the six-movement-quantity measuring apparatus; the cable force sensor, the ship fender sensors and the six-movement-quantity measuring apparatus are respectively connected with the computer. The physical model of the mooring ship disclosed by the invention can simulate the working conditions of combinations of various stormy waves and flows.

Physical model of mooring ship and test method of physical model

The invention discloses a dynamic response model test device for the submarine tunnel under effect of a simulated wave load. The device comprises a model box, a tunnel, a supporting system and a measuring system. The model box comprises a model box bottom plate, angle steel, a model box right side plate, a model box left rotating plate, a model box back panel, tempered glass and an organic glass plate. The supporting system comprises a supporting fork, a supporting tube and a supporting base. The measuring system comprises a strain gauge, a water inflow measuring tank and a piezometer. The strain gauge is adhered on the outer surface of the tunnel and is used for measuring the deformation of the tunnel. The water inflow measuring tank is used for measuring the water inflow of the tunnel. The piezometer is fixed on a sensor fixing bracket and is used for measuring the water pressures of seabed pores. According to the technical scheme of the invention, the water pressure responses of seabed pores around the submarine tunnel, at different buried depths, different excavating radiuses and different lining thicknesses of the tunnel, can be simulated. Meanwhile, the device provides an effective test data support for the research on the submarine tunnel dynamic response problem under the effect of the wave load, and facilitates the theoretical analysis.

Dynamic response model test device for submarine tunnel under effect of simulated wave load

The invention discloses a multi-boundary test water tank for underwater vibration simulation, and the water tank comprises a tank box in a U-shaped structure Two opening sides of the tank body are respectively provided with a baffle plate, and the interior of the tank body is provided with two partitioning plates Each partitioning plate is parallel to the corresponding baffle plate, and is perpendicular to the bottom surfaces and two side surfaces of the tank body Two side surfaces of the tank body are respectively provided with a plurality of groups of slots, and the partitioning plates are fixed in the slots and are symmetrically arranged based on the central position of the tank body The bottom plate of the tank body is provided with a connecting hole and a drainage hole The connecting hole is provided with a sealing ring, wherein the section of the sealing ring is semi-circular, and the central part of the sealing ring is provided with a connecting plate The connecting plate is formed by the welding of an upper connecting plate, a lower connecting plate, and a central rib plate The upper connecting plate is connected with the sealing ring, and the lower connecting plate is connected with a testing vibration bench The tank can lengthen the tank body through splicing, is convenient to improve, can simulate different boundary conditions, is wide in application range, can enable a user to watch wave change effects under different vibration conditions through transparent glass, and is very convenient for operation and observation

Multi-boundary test water tank for underwater vibration simulation

A test apparatus for simulating undersea pipeline-laying process of J type pipe-laying ship, comprises a test water pool, slide rails set on the two ends of the upper portion of the test water pool, a vibration platform mounted on the slide rails, a model prototype of a pipe-laying tower of the J type pipe-laying ship pivoted on the vibration platform, a mobile platform pivoted at one side of the vibration platform, a counter weight block mounted at the other side of the mobile platform, a motor straight line transmission device mounted below the mobile platform, and a flow and wave making device mounted on the test water pool, wherein an upper pipe frame and angle regulators are mounted on the vibration platform surface of the vibration platform; and the angle regulators are mounted at two sides of a main body tower frame. According to the invention, the undersea pipeline-laying process of the J type pipe-laying ship in various marine environment can be simulated; the problem that the submarine pipeline-laying process of the J type pipe-laying ship can't be simulated on land under various marine environment conditions is solved; in addition, the installation and removal of the test apparatus are convenient, thereby greatly reducing the test cost, and improving the safety and the reliability of offshore operation.

Test apparatus for simulating undersea pipeline-laying process of J type pipe-laying ship

A large-scale simulation test system simulating combined effects of earthquakes, waves and ocean currents belongs to the marine structure dynamic test technical field. The simulation test system comprises a test wave flume, an absorption type wave making apparatus, a test water circulation apparatus, a speed-adjustable pulley platform, an earthquake simulation apparatus, a bidirectional-flow simulation apparatus, and a water-resisting sealing apparatus. The upper plane of a vibration table body of the earthquake simulation apparatus is aligned with the bottom plane of the test wave flume. The water-resisting sealing apparatus is arranged between the periphery of the vibration table body upper plane and the bottom plane of the test wave flume. The absorption type wave making apparatus is arranged on the head end inside the test wave flume. A flow-making pump of the bidirectional-flow simulation apparatus is connected with head-end current-sharing cases and tail-end current-sharing cases through pipelines. The system with complete test simulation functions can simulate different input excitation test conditions of a marine structure under various load combination effects. Test simulations of earthquakes, waves and ocean currents are all controlled in a full-digital way. The system further has the characteristics of high control precision and diversified test functions.

Kong Xianjing

Papers

Large simulation test system for simulating combined effects of earthquakes, waves and ocean current

Large-scale simulation test system simulating combined effects of earthquakes, waves and ocean currents