Test platform for simulating uniformly distributed load of pipeline in deepwater environment

Abstract

The invention provides a test platform for simulating uniformly distributed load of a pipeline in a deepwater environment, which comprises a high-pressure cabin body. The high-pressure cabin body is provided with a test pipe fitting, and two ends of the test pipe fitting are fixed on two opposite side walls of the high-pressure cabin body through hinge devices. A load loading device comprises a hydraulic device penetrating into the high-pressure cabin body through a hydraulic rod, a displacement transmission plate is installed at the end, located in the high-pressure cabin body, of the hydraulic rod, and a spring set making contact with the test pipe fitting through an elastic piece is installed on the face, away from the hydraulic rod, of the displacement transmission plate. According tothe invention, various uniformly distributed loads can be applied to the test pipe fitting so as to simulate the deformation condition of the test pipe fitting under a real limit condition; the adopted high-pressure cabin body and the load loading device are purely mechanical structures, and can bear water pressure which is strong enough without influencing the precision of a test result.

Description

technical field [0001] The invention relates to the field of deep-sea oil pipeline erection, in particular to a test platform for simulating the uniform load of pipelines in a deep-water environment. Background technique [0002] A submarine landslide is a huge deformation and dynamic process that causes serious damage to offshore facilities such as pipelines and submarine channels. It is of great significance to study the large deformation process of submarine landslides and the interaction between landslides and submarine pipelines for the safety design of practical projects. The current studies on the interaction between submarine landslides and pipelines all use qualitative analysis. The sliding body usually has a constant volume, assumed sliding surface and initial sliding velocity. When the uncertainty of the landslide caused by the natural variation of soil properties is not considered, the In some studies, the pipe-soil interaction is simplified as the local load of...

AI Technical Summary

Problems solved by technology

[0006]1. Domestic and foreign pipeline local action loading devices are generally only suitable for single-point loading or four-point bending loading, and cannot achieve uniform local loading of pipelines, that is, the existing The device mainly acts on one point on the pipeline, but the fatigue damage and crush failure are mostly located at the loading position, so the influence caused by stress concentration cannot be obtained

[0007]2. The test fittings are generally scaled ratio fittings

Because large-scale pipe fittings are not easy to apply uniform loads and are extremely dangerous, applying loads to scaled-scale pipe fittings has size effects, and the accuracy of test results cannot be guaranteed.

[0008]3. The existing domestic test devices are mainly used to simulate the interaction between the pipeline and the soil under normal pressure on land, with limited force types and a single mode of action

Images