考虑关键运动副特点的船用多功能数控机床模态分析  

Modal analysis of marine compound NC machine considering guide-slider motion character and viscous damping

作　　者：孙椰望[1,2] 金鑫[1] 张之敬[1] 张甲英[2] 徐滨士[2] 邓勇军[1] 

机构地区：[1]北京理工大学机械与车辆学院,北京100081 [2]装甲兵工程学院装备再制造技术国防科技重点实验室,北京100072

出　　处：《振动与冲击》2015年第9期32-37,共6页Journal of Vibration and Shock

基　　金：国家科技重大专项资助项目(2012ZX04010-061);北京理工大学科技创新专项计划项目(3030012241303)

摘　　要：针对船用多功能数控机床在舰船环境下的结构动态性能研究,结合舰船波浪载荷作用下的摇荡特点,揭示了机床的运动坐标体系和布局方案,并进行了机床关键导轨滑块运动副5自由度载荷特点的受力分析;依据机床振动理论构建了导轨滑块运动副粘性阻尼振动模型及其有限元结构模型;采用机床锤击试验模态和机床有限元结构模态相结合的方法验证了包含导轨滑块运动副粘性阻尼系统的有限元机床模型的适用性,并分析确定了机床110 Hz内的6阶模态振型及其频率。To study the dynamic characteristics of marine compound NC machine,the machine motion coordinate system and the layout scheme were revealed based on the analysis of the ship sway characteristics under wave loads. The key guide-slider motion of the machine under a 5-DOF load was studied. Then,the guide-slider vibration model with viscous damping and a finite element（ FE） structural model of the machine were created. The hammering modal tests and FE modal analysis were used to study its vibration modes. The results show that the guide-slider vibration model and the FE machine model are correct,and there are 6 modal shapes of the machine within 110 Hz.

关 键 词：船用多功能数控机床 试验模态 有限元分析法 粘性阻尼 

分 类 号：TH112[机械工程—机械设计及理论]