Structure fatigue/durability experiment system and method in complex environment

Abstract

The invention discloses a structure fatigue / durability experiment system and method in a complex environment. The system comprises an environment simulation device, a loading device, a testing device, a ground anchor device and a control terminal, wherein the environment simulation device, the loading device and the testing device are all connected with the control terminal; the environment simulation device, the loading device and the testing device are all arranged on the ground anchor device; the environment simulation device comprises at least one test chamber, all the test chambers are connected in sequence, and a movable partition door is arranged between every two adjacent test chambers; each test chamber is provided with an independent environment simulation mechanism and a control mechanism, the environment simulation mechanism is connected with the control mechanism, and the control mechanism is connected with the control terminal. The environment fatigue / durability experiment of different full-scale structures and models under the coupling action of various complex environments and (random) loads can be realized, the universality is good, and the application range is wide.

Description

technical field [0001] The invention relates to the technical field of fatigue and durability experiments, in particular to a structural fatigue / durability experiment system and method in a complex environment. Background technique [0002] Major equipment or major engineering structures in the fields of land transportation, shipbuilding and ocean engineering, water conservancy and hydropower, ports, wind power generation, aviation, civil engineering, engineering machinery, etc., often work under the coupling of various service environments and loads. The service environment is diverse and time-varying, and the external loads it bears are often variable-amplitude loads that vary with time and space or even random loads. For the anti-fatigue / durability design and safety evaluation of these major equipment and major engineering structures, most of the experimental data currently based are from constant-amplitude fatigue experiments of materials (specimen) or small components, ...

AI Technical Summary

Problems solved by technology

[0005] 1) Simulation and control of low temperature and low humidity (for example: ≤40% R·H at 5-20°C) environment cannot be realized;

[0006] 2) The coupling / joint loading of single environment and constant amplitude cyclic load can only be realized in a certain test chamber, and the arbitrary combination and conversion of multiple environmental factors cannot be realized;

[0007] 3) It is impossible to simulate and control the low temperature environment of ≤-60°C;

[0008] 4) The loading method is monotonous, and generally only constant-amplitude bending fatigue experiments can be carried out;

[0009] 5) Environmental fatigue / durability experiments under random loads on structures such as bridges, deep-sea platforms, ports, dams, ships, and aircraft cannot be realized;

[0010] 6) It is impossible to realize the online measurement of the surface morphology, fatigue crack initiation and growth of the test piece in a complex environment

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