A Fatigue Test Device Coupling Friction Wear and Alternating Stress
A technology of alternating stress and mutual coupling, which can be used in measuring devices, using repetitive force/pulse force to test the strength of materials, instruments, etc., and can solve the problems of reasonable design of flexible umbilical fatigue life and other problems.
Active Publication Date: 2021-08-10
DALIAN UNIV OF TECH
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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
Method used
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Embodiment
[0025] Embodiment: This device can realize a variety of different test states through the linkage of the upper and lower operating platforms. The test method of using this experimental device is as follows:
[0026] As shown in the figure and described above, each component on the upper operating platform 1 and the lower operating platform 2 is assembled.
[0027]Two helically wound members in contact with each other are intercepted from the marine flexible umbilical structure and straightened. According to the geometric space of the experimental device, determine the size of the umbilical to be tested and mark it as A and B.
[0028] The upper operating platform 1 can realize the functions of component rotation, downward extrusion and translation along the fixed slideway. The specific fixing and clamping operation is to fix the test piece A on the sliding device 8 through the fixing device 11, such as Figure 6 shown in .
[0029] Such as Figure 7 As shown, the lower ope...
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The invention discloses a fatigue testing device for mutual coupling of friction, wear and alternating stress, comprising: a lower operating platform and an upper operating platform, the upper operating platform is fixedly connected to the upper end of the lower operating platform; the upper operating platform is fixedly connected to the upper end of the lower operating platform There is a gear motor, the gear motor is meshed with the gear, the gear is connected to the connecting column, and the top of the connecting column is fixedly connected with a hydraulic device. Combined tests of various test conditions, such as tensile bending test, friction test, wear test and multi-working condition compound test, the clamping device of the device can be adjusted for radius, and can be tested for various pipes with different diameters , It can also carry out various composite tests such as extrusion and friction on two kinds of pipes with different diameters. Therefore, the device realizes the joint action of friction and wear of mutual contact components and bending alternating stress, and can test the relationship between the two mechanical behaviors. coupling effect.
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...
Claims
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IPC IPC(8): G01N3/32
CPCG01N3/32G01N2203/0026G01N2203/0073
Inventor 卢青针杨志勋秦安壮阎军史冬岩吴尚华袁振卿邹科陈金龙尹原超胡海涛英玺蓬周保顺苏琦步宇峰何东泽王立夫殷旭朱鹏程毛彦东邢程程
Owner DALIAN UNIV OF TECH