Polar environment ship structure static and dynamic mechanical property testing device and testing method thereof

Abstract

The invention relates to a polar environment ship structure static and dynamic mechanical property testing device and a testing method thereof. The p testing device comprises a high-frequency fatiguetesting machine, a mounting ladder and a movable bracket mounted at the two sides of the high-frequency fatigue testing machine respectively; a low-temperature environment test box is mounted at the top of the movable bracket, and rollers of the low-temperature environment test box are embedded into a track of the movable bracket; and an extension section of a to-be-tested piece is clamped by a hydraulic chuck of the high-frequency fatigue testing machine, and the test section of the to-be-tested piece is wrapped by the low-temperature environment test box. The polar environment is accuratelyand reliably simulated; the mechanical property examination of a ship structural member under different temperatures in the polar environment can be realized; the whole device is high in integration and modularization degree and convenient to install and operate, the low-temperature environment test box can adapt to various ship structural member forms, the utilization rate of testing device is greatly increased, and the testing device can also be popularized and applied to structural assessment of steel strands, high-strength bolts and composite materials and is wide in application range.

Description

technical field [0001] The invention relates to the technical field of testing devices for ship structural performance in polar environments, in particular to a device for testing static and dynamic mechanical properties of ship structures in polar environments and a testing method thereof. Background technique [0002] Polar ships are the main platform for polar route transportation and polar resource exploration and development. The construction materials and welding processes used in polar ships directly determine the safety, reliability and energy efficiency index of polar ships. In the polar environment, with the decrease of the service temperature of the ship, the toughness and the ability to resist the instability of the crack growth of the ship construction steel decrease, and the low stress brittle fracture tendency increases, indicating that the mechanical properties of the marine steel in the low temperature environment are significantly better than those in the ro...

AI Technical Summary

Problems solved by technology

In addition, polar sailing ships are huge and complex large-scale welded structures. In addition to construction materials, welding technology is also a key link. If defects such as pores, slag inclusions, and cracks appear in welded joints and longitudinal girth welds, these defects are prone to cracks, and These defects may cause crack propagation under the combined action of low temperature environment and ice-induced vibration, resulting in structural damage.

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