强化喷射研磨接触区射流激波非均衡传播与互扰动效应抑制研究

Inhibition research on the disequilibrium propagation and mutual disturbance effect of shock wave in the contact zone of strengthen jet flow grinding, proposes a necessary way and inevitable foundation for improving the performance efficiency of strengthen grinding and the finishing quality of machined surface. In this research, the medium of multiphase grinding flow was targeted to investigate the induced disequilibrium propagate condition of shock wave and the response characteristics of fluid dynamic power, with the help of a newly-proposed co-motion theoretical model operated between shock wave vector and flow velocity; Furthermore, based on the captured dynamic data of wave pattern, a series of quantitatively descriptions can be realized for the influential mode of shock wave propagation and the physical pattern of inhibition flow; Besides, a disturbance effect model will be established between the topographic variance of grinded surface and the propagation pattern of shock wave, through studying the interactive correlations among several participant influential factors, such as the dynamic motion stiffness of abrasive particles, the disturbance boundary conditions of shock wave in contact zone, and the mechanical responses characterized by the geometric parameters of machined topography, thereafter the topographic damage caused from the mutual-disturbance effect of shock wave in jet flow can be evaluated by calculating fuzzy set function, with the inhibition strategies of them will be proposed also. This research pays major attentions on the induced disequilibrium propagate conditions of shock wave in a high-pressure loading environment, as the method and mechanism of its inhibited propagation were specially focused, this research also paves a way for the coupling rules between the mutual disturbance effect of shock wave and the micro morphology of multiphase jet flow in a multi-scale condition simultaneously, which results to the provision of evaluation criterion for its influential effects and inhibition strategies in return. Thus an innovative theoretical foundation was established for the research developments on complex multiphase fluid eventually.

对喷射研磨接触区中多相流激波非均衡传播与互扰动效应进行抑制是提高强化研磨效率和表面加工质量的必然途径和重要基础。以多相研磨射流介质为研究载体，基于激波矢量-速度同向理论模型探讨激波非均衡传播诱发条件及流体动力响应特征；在获得激波动态数据的基础上，对复杂多相流激波传播影响模式及其抑制流型进行构建和量化描述；建立研磨表面微观形貌变化对湍流激波传播形态的干扰作用模型，通过探索流场磨料质点动态运动刚度、接触区激波扰动边界条件、形貌几何参数弹性力学响应间量化关系，结合模糊集函数运算进行喷射流激波互扰动效应对研磨形貌的破坏效果评价以及提出其抑制策略。项目重点揭示了高强度加工负荷条件下射流激波非均衡传播诱发条件，提出其传播抑制方法及机理思路，同时在跨尺度条件下探讨激波互扰动效应与多相流形态间耦合作用规律，为其对研磨表面微观形貌的作用影响及抑制策略提供评价判据，并奠定复杂多相流机理研究创新理论和方法基础。

项目针对机器人减速器轴承制造“四高”性能重大需求及前沿热点，在微观-介观尺度围绕强化喷射研磨及界面层形貌结构演变机理开展创新性研究，以突破制约其制造过程中的共性理论技术瓶颈并实现高效控形控性加工目标。通过建立多相流能量传递映射关系模型，揭示表层磨料冲击作用机理及特性规律；探明表层摩擦化学加工机理及效应发展机制，进行材料表/界面层磨料接触状态及强化特性耦合规律研究；发展极端应变率条件下应力应变动态本构建模方法，提出界面层形貌对射流激波传播干扰量化评价机制；开展表层结构失稳临界状态控制策略验证，构建强化喷射研磨加工效应与界面层形貌结构演变机理研究体系并获得加工参数优化方案。项目成果促进了强化喷研高性能微纳加工基础理论内涵发展，对深入认识喷研湍流激振、冲击变形、能量传递、动态本构建模等具有重要学术价值；相关共性技术为提升机器人减速器轴承件表面成型质量、材料强度和工作性能提供关键手段，对解决高端装备核心件制造理论技术难题具有重大意义。. 项目发表论文28篇，在J. Intell. Manuf., Int. J. Adv. Manuf. Technol., Measurement, Int. J. Agric. Bio. Eng., Energies等权威期刊发表论文17篇，其中JCR Q1论文5篇，JCR Q2论文12篇，引用300余次，已录用及在审论文8篇；申请授权专利46件，其中发明专利21件，国际PCT专利2件，广东省重大科技成果登记3项，获国家农业节水科技奖、广东省农业技术推广一等奖；培养青年教师及访问学者10名，博士后1名，博士生2名，硕士生18名，另在读硕士研究生10人，已毕业本科生21人；负责人及项目组先后荣获“科学中国人(2018)年度人物”、“岭南英杰”、广东省\广州市科技创新团队带头人、广州市高层次人才、“广州学者”特聘教授及青年拔尖人才等荣誉称号；获批广东省强化研磨高性能微纳加工工程研究中心、广东省太阳能智能灌溉装备科技创新中心、广东省强化研磨联合创新示范基地、广州市工信委服务机器人智能装备研究平台等重点科研平台，在前期基础上建立先进完善的强化喷射研磨加工效应与界面层形貌微观-介观尺度结构演变机理研究体系，获国内外同行专家高度评价。研究成果成功应用于高端装备关键核心器件精密加工，机器人装备、智能精准灌溉装备关键技术等领域，产生显著经济社会效益。