CAJ | 학술논문

基于响应耦合子结构分析法预测了深孔内圆磨床主轴端点的频响函数。首先对磨床主轴进行子结构划分，计算各子结构自由状态下的频响函数矩阵，然后顺序刚性耦合各子结构的频响函数矩阵，对轴承支撑点使用结构修改法修改轴承约束下的已耦合子结构频响函数矩阵，直至耦合到最后一个子结构，得到主轴端点的频响函数。以某深孔内圆磨床为研究对象，分别基于该方法和有限元法，对其主轴端点的频响函数进行预测，并对其进行实验测试。实验及分析结果表明：该方法预测精度高于有限元分析方法预测精度、计算速度快，便于深孔内圆磨床主轴系统的结构优化。
기우향응우합자결구분석법예측료심공내원마상주축단점적빈향함수。수선대마상주축진행자결구화분，계산각자결구자유상태하적빈향함수구진，연후순서강성우합각자결구적빈향함수구진，대축승지탱점사용결구수개법수개축승약속하적이우합자결구빈향함수구진，직지우합도최후일개자결구，득도주축단점적빈향함수。이모심공내원마상위연구대상，분별기우해방법화유한원법，대기주축단점적빈향함수진행예측，병대기진행실험측시。실험급분석결과표명：해방법예측정도고우유한원분석방법예측정도、계산속도쾌，편우심공내원마상주축계통적결구우화。
Based on RCSA,this paper predicted the frequency response function of the endpoint of a deep hole internal grinder spindle.At first,the method separated the model of grinder spindle into several subsections to calculate their free-state frequency response function (FRF)matrices,then rig-idly coupled the FRF matrices of each substructure sequentially,revised the FRF matrices of the cou-pled substructure with structural modification method at the support points of bearings,coupled till to the last substructure,then the FRF of the endpoint of grinder spindle was calculated.With a deep hole internal grinder spindle system as the research obj ect,the paper predicted the FRF of the spindle endpoint through proposed method and finite element method,meanwhile a group of FRF data were collected by experiments.Experimental results indicate that this method,with higher prediction preci-sion and faster calculation speed,is better in the structure optimization of the deep hole internal grind-er spindle system.