A method for predicting the service life of high-speed rail front windshield under the action of wind and sand

Abstract

The invention discloses a method for predicting the service life of a high-speed rail front windshield under the action of wind and sand. The model includes a three-phase coupling method of fluid, bulk and solid under the action of the high-speed iron front windshield and sandstorm and the calculation of the service life of the high-speed rail front windshield under the action of wind and sand. Including steps: 1) Simulate the wind pressure distribution under the action of the wind field in the fluid calculation software CFD and export it and import it into the discrete element and finite element coupling analysis software CDFP; 2) Divide the three-dimensional in the discrete element and finite element coupling analysis software CDFP Euler grid and input wind pressure; 3) Calculation of the movement of discrete element particles under the action of the wind field and the interaction with the solid finite element under the action of the wind field; 4) Use the general Archard wear model to calculate the wear amount; according to The amount of wear is used to predict the service life of high-speed rail. The invention can approximately analyze and predict the service life of the front windshield of the high-speed railway under the action of wind and sand, the model is simple, the amount of calculation is small, and the data is accurate and the simulation degree is high.

Description

technical field [0001] The invention relates to a fluid, bulk and solid three-phase coupling method, in particular to a method for predicting wear and service life of brittle materials under the action of wind and sand, specifically a method for predicting the service life of high-speed rail front windshields under the action of wind and sand Background technique [0002] In recent years, high-speed railway has developed rapidly in my country due to its advantages of large carrying capacity, fast operation speed and reasonable economy. However, the Silk Road passes through a large number of desert areas. In the windy environment in the desert area, the sand impact abrasion failure performance of the window glass seriously affects the safety of high-speed rail driving. The Lanzhou-Xinjiang high-speed railway, which opened to traffic in December 2014, has a design speed of 300-350km / h, but the current operating speed is only 200-250km / h. Most of the lines of the railway are l...

AI Technical Summary

Problems solved by technology

To simulate the process of glass breakage under the coupling action of fluid, bulk and solid fields, the simulation model is complex, resulting in a huge amount of calculation, and it is even impossible to complete. Therefore, a method of approximately predicting the front windshield through finite simulation analysis and calculation is proposed. A Discrete Analysis Method for the Service Life of

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