CAJ | 학술논문

刀盘是割草机重要部件，其工作时固有频率与振型的大小直接关系到整机的可靠性与安全性。为此，利用CAD／CAM 软件Pro／E 建立刀盘的三维实体模型，并将其导入有限元分析软件 ANSYS Workbench ，对所建模型进行模态有限元仿真分析，提取前6阶固有频率，与刀盘转速进行比较，计算出其工作时的危险转速范围。分析结果表明：刀盘最高工作转速远低于其1阶临界转速，有效地避免了共振的发生，验证了刀盘设计的合理性，可为刀盘其它的动力学分析奠定基础。
도반시할초궤중요부건，기공작시고유빈솔여진형적대소직접관계도정궤적가고성여안전성。위차，이용CAD／CAM 연건Pro／E 건립도반적삼유실체모형，병장기도입유한원분석연건 ANSYS Workbench ，대소건모형진행모태유한원방진분석，제취전6계고유빈솔，여도반전속진행비교，계산출기공작시적위험전속범위。분석결과표명：도반최고공작전속원저우기1계림계전속，유효지피면료공진적발생，험증료도반설계적합이성，가위도반기타적동역학분석전정기출。
The cutter is quite important for the lawn-mower , because whether the machine is reliable or secure enough is directly related to the cutter natural frequency as well as its mode shape size .With the help of the Pro/E system from CAD/CAM, we establish solid model of the cutter with three dimensions .For further research , the mode finite element simulation analysis is tested by being imported into the ANSYS Workbench system .After extracting the former six-order intrinsic frequency followed by comparing with the rotate speed about the cutter , we obtain the range of the rotate speed to keep safety when it is working .The result shows that the highest rotate speed of the cutter is far lower than its first order critical speed which avoids the sympathetic vibration efficiently .In addition , we verify that the cutter is designed relative-ly rational , and this surely lays a solid foundation for the other dynamics analysis of the cutter .