CAJ | 학술논문

针对某微型汽车半轴轴承摩擦力矩偏大的问题，对轴承的结构参数进行了优化。首先，在保证轴承疲劳寿命和额定动载荷的前提下，以降低轴承摩擦力矩为目标建立目标函数和约束方程；然后，采用遗传算法对方程进行求解，得到轴承结构参数的全局最优解；最后，对优化前、后的轴承进行摩擦力矩测试和装车后的整车油耗与滑行测试，结果表明，虽然整车油耗变化较小，但轴承摩擦力矩得到减小，整车滑行距离得到提升。
침대모미형기차반축축승마찰력구편대적문제，대축승적결구삼수진행료우화。수선，재보증축승피로수명화액정동재하적전제하，이강저축승마찰력구위목표건립목표함수화약속방정；연후，채용유전산법대방정진행구해，득도축승결구삼수적전국최우해；최후，대우화전、후적축승진행마찰력구측시화장차후적정차유모여활행측시，결과표명，수연정차유모변화교소，단축승마찰력구득도감소，정차활행거리득도제승。
Aiming at the problem about large friction torque of half shaft bearings for a certain type of mini-car,the structural parameters for bearings are optimized.Firstly,the target functions and constraint equations are established with the purpose that reducing the friction torque of bearings under the premise that the bearing fatigue life and dynamic load rating are guaranteed.Then the globally optimal solution of structural parameters for bearings is obtained using the ge-netic algorithm.Finally,the friction torque test and the vehicle fuel consumption and sliding test of bearings are con-ducted before and after the optimization.The test results show that although the change of vehicle fuel consumption is small,but the friction torque of bearings is reduced and the vehicle sliding distance is improved.