Sectional type inclined groove blade characteristic parameter optimization method for ventilated brake disc

Abstract

The invention discloses a segmented inclined groove blade characteristic parameter optimization method of a ventilated brake disc. The optimization method comprises the following steps: step 1, establishing a segmented inclined groove blade model of the brake disc; determining structural characteristic parameters, needing to be optimized, of the sectional type inclined groove blade; determining an optimization target and constraint conditions; step 2, carrying out numerical simulation by adopting a sectional inclined groove blade model, carrying out data sampling based on an optimal Latin hypercube method, fitting a response surface agent model and verifying the accuracy of the agent model; step 3, adopting NSGA-II to solve the two objective functions to obtain a Pareto optimal solution set; and step 4, obtaining an optimal solution in the Pareto optimal solution set through a TOPSIS decision method, and performing CFD verification. According to the optimization method, the characteristic parameters of the segmented inclined groove blades in the brake disc can be optimized and improved, and the convection heat dissipation performance of the brake disc is improved.

Description

technical field [0001] The invention relates to the technical field of vehicle braking, in particular to a method for optimizing the characteristic parameters of segmented inclined groove blades of a ventilated brake disc. Background technique [0002] The existing ventilated brake disc used for vehicle braking mostly uses straight blades inside. The ventilated straight blade brake disc has two outer friction surfaces. The inner surface of the brake disc is connected by straight blades to allow air flow. Higher temperatures are reached when braking, and the continuous airflow across the blades provides good cooling, extending the life of the brake discs. However, when the straight blade brake disc rotates counterclockwise, the left side of the heat dissipation channel is subjected to high pressure relative to the right side. The left side and the right side are respectively called the pressure side and the suction side. Because of the existence of the air inflow angle, the r...

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Problems solved by technology

However, when the straight blade brake disc rotates counterclockwise, the left side of the heat dissipation channel is subjected to high pressure relative to the right side. The left side and the right side are respectively called the pressure side and the suction side. Because of the existence of the air inflow angle, the radial suction The flow velocity on the suction side gradually decreases, and the kinetic energy of the fluid itself is not enough to take away the fluid on the suction side, so there is a backflow area on the suction side of the flow channel

The existence of the recirculation area in the ventilated brake disc channel seriously blocks the flow of air, and it is difficult for the new cooling air to exchange with the internal air, resulting in uneven flow on both sides, which eventually leads to uneven heat dissipation in the channel, seriously reducing the brake disc convection cooling performance

[0003] At present, most scholars at home and abroad focus on the simulation analysis, prediction and experimental verification of the aerodynamic performance and heat transfer effect of the brake disc in the study of improving the heat dissipation efficiency of the ventilated brake disc. There are few studies on the optimization of the characteristic parameters of segmental inclined groove blades

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