Abstract
For the design of double-row blades hydraulic retarder involves too many parameters, the solution process of the optimal parameter combination is characterized by the large calculation load, the long calculation time, and the high cost. In this paper, we proposed a multiobjective optimization method to obtain the optimal balanced solution between the braking torque and volume of double-row blades hydraulic retarder. Moreover, we established the surrogate model for objective function with radial basis function (RBF), thus avoiding the time-consuming three-dimensional modeling and fluid simulation. Then, nondominated sorting genetic algorithm-II (NSGA-II) was adopted to obtain the optimal combination solution of design variables. Moreover, the comparison results of computational fluid dynamics (CFD) values of the optimal combination parameters and original design parameters indicated that the multiobjective optimization method based on surrogate model was applicable for the design of double-row blades hydraulic retarder.
Highlights
Speed limitation and braking of vehicles are extremely important to driving safety
Hydraulic retarder has been increasingly widely applied in heavy trucks and buses and has become an important auxiliary braking device
LHS was used to select 30 sets of sample points firstly and surrogate models of the objective functions were established with radial basis function
Summary
As an auxiliary braking device, hydraulic retarder is characterized by the large high-speed braking torque, the smooth and comfortable braking process, the good heat dissipation performance, and the constant braking speed and has been widely used. The application of hydraulic retarder allows the engine speed of heavy trucks and buses to be distributed in the economical range, reducing energy consumption. Foreign auxiliary braking device of vehicles mainly includes electric eddy current retarder and hydraulic retarder, which, respectively, account for 2% and 98% market shares. With the development of heavy trucks and buses, the market requires the superior hydraulic retarder with the high energy capacity, small size, and fast response. The performance parameters of hydraulic retarder include the number of blades, blade angle, and circulatory circle size, which have corresponding ranges. In addition to the requirements of customers, the optimal performance of the products should be realized in the design of new products [1]
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