CAJ | 학술논문

节点位置是变幅杆设计的关键参数，该位置通常用来设置法兰盘，从而实现变幅杆与其他机构的有效连接。传统解析法通常将变幅杆轴线上位移为零的点作为节点，但在试验中发现，用解析法确定的节点位置往往存在较大的振动位移。在解析法的基础上对带工具头变幅杆进行设计，并借助于有限元软件对变幅杆进行分析研究，研究表明带工具头变幅杆的节点位置存在定位偏差，轮廓线与轴线上节点位置不重合，对频率为35kHz 的变幅杆而言，其轮廓线上节点向变幅杆小端偏移1.5mm。试验现象表明，相对轴线节点，在轮廓上的节点位置来设置法兰盘可降低系统能量耗散，提高系统稳定性。
절점위치시변폭간설계적관건삼수，해위치통상용래설치법란반，종이실현변폭간여기타궤구적유효련접。전통해석법통상장변폭간축선상위이위령적점작위절점，단재시험중발현，용해석법학정적절점위치왕왕존재교대적진동위이。재해석법적기출상대대공구두변폭간진행설계，병차조우유한원연건대변폭간진행분석연구，연구표명대공구두변폭간적절점위치존재정위편차，륜곽선여축선상절점위치불중합，대빈솔위35kHz 적변폭간이언，기륜곽선상절점향변폭간소단편이1.5mm。시험현상표명，상대축선절점，재륜곽상적절점위치래설치법란반가강저계통능량모산，제고계통은정성。
The node position is a key parameter in designing an amplitude transformer. At this position, a ring flange is usually set up to realize the effective connection of the amplitude transformer with other parts. In the traditional analytic method, the zero displacement point of amplitude transformer axis is usually considered as a node. But in experiments, it is found that the node vibrates with a larger displacement. In this paper, the amplitude transformer with tool head is designed based on the analytic method with finite element software. The research shows that the node of the amplitude transformer is deviated to some extent. That is to say, the node on the contour line doesn’t coincide with that on the axis. For a 35 kHz amplitude transformer, the node on contour line is deviated by 1.5 mm toward the small end of the am-plitude transformer. Experiments show that relative to the axis node, setting the ring flange at the contour node can re-duce the energy dissipation and improve the stability of the system.