新工科背景下虚拟仿真技术在轴系零件设计中的应用

面对"新工科"建设过程中工程类专业对机械结构设计的需求,探索了虚拟仿真技术在轴系零件设计中的教学模式。分析了传统的"机械设计"轴系零件设计章节教学中存在的问题,将先进的虚拟仿真设计与分析方法引入当前课程中。对于齿轮的设计,可根据其所需的传动比在机械设计软件中进行配齿,直接计算出齿根弯曲与齿面接触疲劳安全系数。对于轴与轴承的设计,可通过轴在纯扭矩作用下的剪应力计算公式得出其最小直径后,再按轴上零件的周向与轴向定位确定阶梯轴的各部分尺寸,最后获得轴的强度与刚度及轴承的寿命。该方法提高了轴系零件的设计效率。

Application of virtual simulation technology in shafting parts design under background of new engineering

In the face of new requirement of mechanical structure design for engineering majors in the process of new engineering construction,the new teaching mode of virtual simulation technology in shafting part design is explored.The problems existing in the teaching of the shafting parts design by the traditional method are analyzed.The advanced virtual simulation design and analysis approach is introduced into the current course.For the gear design,gear matching can be carried out in the mechanical design software according to the required transmission ratio,and the safety factors of tooth root bending and tooth surface contact fatigues can be calculated directly.For the shaft and bearing design,the minimum diameter of the shaft can be obtained by the shear stress calculation formula with pure torque.Then dimensions of each part of the stepped shaft can be determined according to the circumferential and axial positioning of the parts on the shaft,and finally the strength and rigidity of the shaft and the life of the bearing can be obtained.The present method improves the design efficiency of shafting parts.