Fatigue testing device for mutual coupling of frictional wear and alternating stress

Abstract

The invention discloses a fatigue testing device for mutual coupling of frictional wear and alternating stress. The method comprises a lower operation table and an upper operation table; the upper operation table is fixedly connected to the upper end of the lower operation table; a gear motor is fixedly connected to the upper operation table, the gear motor is connected with a gear in a meshed mode, the gear is connected to a connecting column, and a hydraulic device is fixedly connected to the top end of the connecting column, so that tests such as independent stretching and bending of the marine flexible pipe cable can be achieved, and combined tests under various test working conditions can also be conducted. For example, a stretch bending test, a friction test, an abrasion test and a multi-working-condition composite test are carried out; the radius of the clamping device of the device can be adjusted, various pipelines with different pipe diameters can be tested, and composite tests in various different forms such as extrusion and friction can also be carried out on two pipelines with different pipe diameters. Therefore, the device realizes the combined action of frictional wear and bending alternating stress of components in contact with each other, and can test the coupling effect of two mechanical behaviors.

Description

technical field [0001] The invention relates to the technical field of structural body deformation testing for friction, wear and fatigue behaviors of large umbilical test pieces, in particular to a fatigue test device for mutual coupling of friction, wear and alternating stress. Background technique [0002] my country's offshore oil and gas reserves are abundant, and most of them are distributed in deep waters such as the South China Sea. Submarine cables, umbilical cables and flexible pipelines are one of the indispensable equipment in deep sea oil and gas exploitation. Such equipment can be collectively referred to as marine flexible umbilicals, and its structure is usually composed of corresponding functional components and strengthening components such as armored steel wires. According to different engineering needs, the pipe cable with corresponding functions is selected; the submarine cable is mainly responsible for providing electric energy for the subsea oil produ...

AI Technical Summary

Problems solved by technology

As the application conditions of dynamic cables become more and more severe, such as extreme loads in deep water and ultra-deep water, floating wind power or large-scale movement of offshore mining platforms, the inaccurate prediction of the fatigue life of flexible umbilical cables makes reasonable design changes. more and more difficult

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