It is well known that groove texture with a careful design can be used to enhance the load-carrying capacity of oil film under the conditions of hydrodynamic lubrication. In this study, a general parametric model was developed, and agenetic algorithm-sequential quadratic programming hybrid method was adopted to obtain the global-optimum profile of the groove texture. The optimized profiles at different rotating speeds are all chevrons. The numerical analysis results verified the effect of the optimization. In addition to the numerical optimization, experiments were conducted to validate the superiority of the optimized results.The experimental results show that the optimized groove texture can efficiently reduce the coefficient of friction (COF) and the temperature rise of the specimen. In particular, the optimized groove textures can achieve stable ultra-low COF values (COF < 0.01) under certain conditions.

中文翻译：

---

优化凹槽纹理轮廓以改善流体动力润滑性能：理论和实验

众所周知，在流体动力润滑的条件下，可以使用精心设计的沟槽纹理来增强油膜的承载能力。本研究建立了一个通用的参数化模型，并采用遗传算法-序列二次规划混合方法获得了槽纹纹理的全局最优轮廓。在不同转速下的优化轮廓都是人字形。数值分析结果验证了优化的效果。除了数值优化外，还进行了实验以验证优化结果的优越性。实验结果表明，优化的沟槽纹理可以有效降低摩擦系数（COF）和试样的温度升高。特别是，