Wave flow-structural object-seabed power coupling experimental simulating method and appts. thereof

Abstract

The invention discloses a simulation method of 'wave current-structure-seabed' dynamic coupling experiment. The method utilizes a simulated experimental water tank, sinks the simulated structure on the simulated seabed in the simulated experimental tank, and controls the structure through a sensor. The dynamic load on the object, the dynamic response of key parts, and its dynamic displacement change are detected, and the wave height meter, PIV particle image velocimeter, and Doppler laser velocimeter are set up to measure the wave height and the velocity of the flow field around the structure. The dynamic response of the soil is detected through the pore water pressure sensor and the earth pressure cell, and finally the detection data is collected and processed synchronously through the multi-channel data acquisition system to truly reproduce the actual stress status of the structure . The invention also discloses a simulated experiment water tank. A seabed simulated tank is arranged at the bottom of the simulated experiment tank, and the simulated tank is filled with simulated seabed soil. This method can truly reproduce the actual stress state of the structure.

Description

technical field [0001] The invention relates to a 'wave current-structure-seabed' dynamic coupling experimental simulation method and a device thereof for studying the stability of marine structures. Background technique [0002] In offshore oil exploitation and port engineering construction, it is necessary to ensure the stability of marine structures (such as offshore platforms, submarine pipelines, breakwaters, etc.) under the action of waves and currents. There are too many marine structure instability accidents caused by wave and current loads every year. For example, due to tidal erosion in my country's Bohai Sea, pipelines are suspended as high as 2 feet from the seabed, with a span of 440 feet. Last year, a serious accident occurred in my country's Pinghu Oilfield where a gas pipeline broke due to erosion. [0003] Since the 1950s, starting from the requirements of shipbuilding, water conservancy, hydropower, shipping, ocean engineering, and underwater weapon system...

AI Technical Summary

Problems solved by technology

Since the stability of marine structures built on the seabed under wave and current loads is a dynamic coupling issue between 'wave current-structure-seabed', which involves fluid mechanics, structural mechanics and rock and soil mechanics, etc. Various disciplines, only relying on the existing simulation experiment tanks and sandboxes and other experimental devices cannot reproduce the actual stress conditions of marine structures, and cannot provide accurate experimental reference data for the construction of marine structures

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