摘要
为获取准确评价加工中心系统动刚度性能的重要参数,结合某加工中心采用ANSYS软件建模并进行仿真分析研究。加工中心模型建立后,采用弹簧刚度法处理机床结合面,并求解其3阶模态,模态仿真结果与锤击法获取的试验结果相对误差低于10%,验证了模型正确性。基于所建模型运用模态叠加法进行谐响应分析,以获取各方向动刚度曲线。通过动刚度曲线分析得到固有频率、过柔度等参数可较准确表征系统的动态特性,为数控机床动刚度预测提供有效参考。
In order to obtain an accurate evaluation of the dynamic stiffness performance of the machining center system,a machining center is modeled by ANSYS software and the simulation analysis is carried out. After the machining center model is established,the method of spring stiffness is used to treat the interface of machine tool,and the three-order modal is solved. The result of modal simulation and the test results obtained by hammering method is less than 10%,which verifies the correctness of the model. Based on the model,the modal superposition method is used to analyze the harmonic response to obtain the dynamic stiffness curves. The dynamic characteristics of the system can be accurately characterized by the analysis of the dynamic stiffness curve,the intrinsic frequency and the degree of flexibility,which can provide an effective reference for the dynamic stiffness prediction of NC machine tools.
作者
孙康
钟建琳
SUN Kang;ZHONG Jianlin(Mechanical Electrical Engineering School,Beijing Information Science ＆ Technology University,Beijing 100192 ,China)
出处
《北京信息科技大学学报（自然科学版）》
2018年第3期5-9,共5页
Journal of Beijing Information Science and Technology University
基金
国家自然科学基金项目(51575055)
关键词
模态
固有频率
动刚度
刚度指标
modes
natural frequencies
dynamic stiffness
evaluating indicator
