High-precision simulation method for temperature change of disc brake of vehicle under multi-cycle braking working condition

Abstract

The invention provides a high-precision simulation method for temperature change of a disc brake of a vehicle under a multi-cycle braking working condition. The high-precision simulation method comprises the following steps of S1, building a mathematical model of vehicle speed and brake disc rotating speed change; S2, constructing a solid calculation domain for transient heat conduction and heat radiation calculation; S3, setting a heat flux boundary condition for the friction surface of a brake shoe according to the mathematical model for calculating the brake heat flux in each single cycle;S4, setting a heat flux boundary condition for the friction surface of the brake disc by using a P-in-P algorithm; S5, constructing a fluid calculation domain for carrying out steady-state fluid mechanics calculation; S6, setting a fluid-solid dual-computational domain data mapping strategy, and performing fluid-solid dual-computational domain coupling computation; and S7, stopping the fluid-soliddual-computational domain coupling computation until the test end time point. According to the method, the problems of tedious calculation process and low calculation efficiency caused by excessive CAE analysis software involved in the calculation of the temperature change of the vehicle disc brake under the multi-cycle braking working condition in the existing simulation method can be solved.

Description

technical field [0001] The invention belongs to the technical field of automobile simulation, and in particular relates to a high-precision simulation method for the temperature change of a disc brake of a vehicle under multi-cycle braking conditions. Background technique [0002] For vehicles with disc brakes, if the cooling performance of the brakes is insufficient, the heat generated during the braking process will not be dissipated in time, which will not only affect the service life of the brake disc itself, but also indirectly affect the brake performance. The performance of other components of the system may even lead to a series of safety issues. In recent years, more and more OEMs have paid attention to evaluating the brake cooling performance of vehicle disc brakes and avoiding the overheating of brake discs and other components during braking. As a common test condition for vehicle brake cooling performance, the multi-cycle repetitive braking condition has high r...

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Problems solved by technology

[0003] In view of this, the present invention proposes a high-precision simulation method for the temperature change of the vehicle disc brake under multi-cycle braking conditions to solve the problem of the existing simulation method in the high-precision simulation of the temperature change of the vehicle disc brake under multi-cycle braking conditions. The analysis of the temperature distribution change of the vehicle disc brake is not accurate enough and the efficiency is low

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