摘要
熔融沉积成型(FDM)是当今迅速发展起来的一种快速成型技术(也称3D打印技术),在一定时间内能够直接打印出具有复杂几何形状的模型或零件。然而,FDM产品在机械性能方面却很难与传统加工方式生产的零件相媲美,成为了制约该项技术发展的重要因素之一。首次提出利用振动提高FDM薄板的动力学特性的新方法:将振动引入FDM过程,建立了振动式FDM 3D打印机;分别制备了引入振动前、后Z和X两个打印方向的试验样件,并进行了相应的锤击法模态试验;对比分析利用振动进行加工的FDM样件和普通样件的试验结果,确定振动利用对FDM薄板动力学性能的影响规律。研究表明,利用振动能够使FDM薄板的固有频率发生改变,有效降低其共振响应,提高模态阻尼比,从而提高FDM薄板的阻尼减振性能。
Fused deposition modelling(FDM)is a fast growing rapid prototyping technology.It is able to build functional parts with complex geometrical shapes in reasonable time.However,the mechanical property of the built parts is hardly comparable to those produced by the traditional method,which is one of the most obvious defects that hinder the development of rapid prototyping technology.For the first time,this paper utilized vibration into the FDM process to improve the dynamic property of FDM parts.Firstly,a vibrating FDM 3D printer was set up to introduce vibration into the FDM process.The samples built in the Z and the X directions without and with vibration applied were then manufactured respectively,followed by the corresponding impact hammer tests performed.Finally,the effect of applied vibration on the dynamic property of FDM plates was experimentally investigated.It is shown that the applied vibration can significantly change the natural frequency,decrease the resonant response,and increase the modal damping ratio,thus improve the anti-vibration capability of FDM plates.
作者
姜世杰
Yannick Siyajeu
史银芳
孙宁宁
赵春雨
JIANG Shijie;Yannick Siyajeu;SHI Yinfang;SUN Ningning;ZHAO Chunyu(School of Mechanical Engineering and Automation,Northeastern University,Shenyang 110819,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2019年第16期1-6,共6页
Journal of Vibration and Shock
基金
国家自然科学基金(51705068)
基本科研业务项目(N150303003)
关键词
熔融沉积成型(FDM)
动力学特性
利用振动
固有频率
共振响应
阻尼比
fused deposition modelling(FDM)
dynamic property
utilize vibration
natural frequency
resonant response
damping ratio
