Fatigue-life detection method and system for aluminium alloy for railway vehicles

Abstract

The invention provides a fatigue-life detection method and system for aluminium alloy for railway vehicles. The fatigue-life detection method comprises the following steps: acquiring first detection frequency for detecting the fatigue life of the aluminium alloy for railway vehicles; using the first detection frequency or the first detection frequency and preset second detection frequency to carry out fatigue load test on the aluminium alloy for the railway vehicles to obtain a fatigue-life detection result of the aluminium alloy for the railway vehicle, wherein the first detection frequency is higher than the second detection frequency; and acquiring a fatigue-life detection report of the aluminium alloy for the railway vehicle according to the fatigue-life detection result of the aluminium alloy for the railway vehicle. The fatigue-life detection method and system provided by the invention have the advantages that the fatigue test period of a novel material for bodies of high-speed rains is effectively and reliably shortened, the test cost is greatly reduced, the period of technical preparation of a new product is reduced, and guarantee is provided for research and development of new vehicle types such as the existing motor train units.

Description

technical field The invention relates to the technical field of rail transit, in particular to a method and system for detecting the fatigue life of aluminum alloys used in rail vehicles. Background technique The rail transit system is a transportation system that uses vehicles running on fixed guide rails in cities and is mainly used for urban passenger transport. The rail vehicles in the rail transit system are the main artery of passenger flow and the lifeline project of the city, which is directly related to the travel of urban residents. Work, shop and live. The aluminum alloy for rail vehicles and its welded joints are essential key materials and components for rail vehicles, and whether the fatigue life of aluminum alloys for rail vehicles and their welded Key to safe and reliable operation. The standard fatigue test of aluminum alloys (7 series and 6 series) and its welded joints for rail vehicles is a procedure that must be passed through to inspect the quality o...

AI Technical Summary

Problems solved by technology

The standard fatigue test of aluminum alloys (7 series and 6 series) and its welded joints for rail vehicles is a procedure that must be passed through to inspect the quality of materials and welded joints before train production. The current fatigue test is carried out at a frequency of 10-20 Hz. There are obvious deficiencies in the low-frequency detection test, mainly manifested in low efficiency and long cycle, which often affect the normal production and delivery period of trains

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