Theoretical and Experimental Study of the Vibration Dynamics of a 3D-Printed Sandwich Beam With an Hourglass Lattice Truss Core

Frontiers in Mechanical Engineering

Zhenkun Guo²  Liuding Yu²  Jingchao Jiang²  Junrui Liang³  Guobiao Hu³  Xin Li³ 

[1] College of Mechanical Engineering, Beijing University of Civil Engineering and Architecture, Beijing, China;Department of Mechanical Engineering, University of Auckland, Auckland, New Zealand;School of Information Science and Technology, ShanghaiTech University, Shanghai, China;

关键词: 3D printing;    sandwich beam;    hourglass lattice core;    NES;    vibration test;   

DOI  :  10.3389/fmech.2021.651998

来源: DOAJ

【 摘 要 】

3D printing (also known as additive manufacturing) has been developed for more than 30 years. The applications of 3D printing have been increasingly extended to a variety of engineering fields in recent years. The sandwich material with a high strength and overall low density is a kind of artificial material that has been extensively used in various industrial and daily life applications. This paper presents a comprehensive vibration analysis and passive control technique for a cantilevered sandwich beam with an hourglass lattice truss core fabricated with 3D printing technology. The governing equation of the beam is established by using a homogenized model and the Hamilton's principle, from which the natural frequencies are determined. The theoretical model is verified by the results from the existing literature and the finite element analysis. The frequency response of the sandwich beam measured experimentally further validates the proposed model. Subsequently, a non-linear energy sink (NES) is proposed for being employed to passively suppress the vibration of the sandwich beam. A parametric study based on the theoretical model confirms the viability of using NES to effectively control the vibration of the sandwich beam. This work presents a good demonstration of using 3D printing technology for fabricating sandwich beams with a complicated lattice core. More importantly, some guidelines regarding the dynamic analysis of sandwich beams are provided. In addition, the analytical method presented in this work provides a potential means to theoretically explore the advantages of using sandwich beams for energy harvesting in the future.

【 授权许可】

Unknown