Device and experimental method for simulating influence on pipeline project by seabed tide sand waves

Abstract

The invention discloses a device and experimental method for simulating influence on a pipeline project by seabed tide sand waves. The device includes an experimental sink and tide generating system,a terrain scanning system, a seabed pipeline simulation measurement system and a data acquisition and processing controller. The experimental sink and tide generating system is used for simulating seabed sand slopes and utilizing a water pump for forming reciprocating current. The terrain scanning system collects forms of the sand slopes by utilizing an ultrasonic topographic instrument and transmits data to the data collecting and processing controller. The seabed pipeline simulation measurement system utilizes optical fiber strain sensors arranged on the side walls of a pipeline model to collect pipeline deformation data, utilizes a high speed camera to collect pipeline displacement information and transmits the information to the data collection and processing controller. By adopting the device provided by the invention, experiments studying influence on the pipeline project by seabed tide sand waves can be conducted. According to the invention, the water pump is utilized for forming a periodically changing water current simulation tide field, in combination with the formation of tide sand slopes, influence on seabed pipelines by sand waves is simulated. The collected data is real and the reference value is high.

Description

technical field [0001] The invention relates to the fields of marine engineering, sediment kinematics and marine measurement, in particular to a device and an experimental method for simulating the influence of seabed tidal sand waves on pipeline engineering. Background technique [0002] With the development of offshore oil and gas resources, submarine pipelines have become the main way of offshore oil and gas transportation. Submarine sand wave is a typical submarine geomorphology with approximately wavy distribution. The wavelength scale is from a few meters to hundreds of meters, and the wave height is about a few meters. It is widely distributed in the offshore continental shelf sea area. Ocean observation data show that tidal currents are one of the main reasons for the formation of seabed sand waves. Submarine sand waves are generally active. In some cases, submarine sand waves will move rapidly, causing the exposure or suspension of submarine pipelines, which will e...

AI Technical Summary

Problems solved by technology

At present, in the laboratory, waves or unidirectional flow are mainly used to simplify the replacement of tidal currents, but the obtained topographic scale is very small, and the wavelength is only a few centimeters long, which is essentially a sand pattern (a smaller terrain), which is not true. current sand wave

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