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

Abstract

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.

Description

technical field [0001] The invention relates to a large-scale simulation test system for simulating the joint action of earthquakes, waves and ocean currents, belonging to the technical field of marine structure dynamic experiments. Background technique [0002] The main loads on large structures such as offshore oil drilling platforms, artificial islands, ports, and nuclear power plants are natural disasters such as waves, tidal currents, earthquakes, sea ice, and strong storms. Especially when several of the above-mentioned disasters occur at the same time, the threat to the safety of large-scale structures is greater, and the disasters caused are more serious; due to the complexity of waves, tidal currents, and earthquakes, so far the experimental research on the above-mentioned structures has been limited to water The dynamic test is only to study the influence of waves and currents on structures in water, and to carry out seismic test research on ordinary test rigs to s...

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Problems solved by technology

[0003] 1. Under the action of earthquake load, the underwater structure not only bears the seismic inertial force, but also has additional loads such as hydrodynamic pressure on the contact surface between the structure and the water body. Traditional earthquake simulation equipment cannot solve the simulation problem of fluid-solid coupling during earthquakes.

[0004] 2. Whether it is a single hydrodynamic test or an earthquake simulation test, it cannot solve the joint action simulation problem of waves, tidal currents, earthquakes and other loads on the structure.

[0005] 3. In the vicinity of Bohai Bay in my country, regardless of Shengli, Dagang or Liaohe Oilfield, their offshore drilling platforms may be threatened by sea ice in winter, and the previous test methods lack the ability to realize the combined effects of waves, tidal currents, earthquakes and sea ice. simulation test equipment

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