瓦楞纸蜂窝-波纹混合芯夹层梁外文.pdf

Composite Structures 171 (2017) 335–344 Contents lists available at ScienceDirect Composite Structures journal homepage: www.elsevi /locate/compstruct Free vibration analysis of sandwich beams with honeycomb-corrugation hybrid cores Zhi-jia Zhang a,b, Bin Han b,c, Qian-cheng Zhang a,b,⇑, Feng Jin a,b,⇑ a State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, PR China b MOE Key Laboratory for Multifunctional Materials and Structures, Xi’an Jiaotong University, Xi’an 710049, PR China c School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, PR China a r t i c l e i n f o a b s t r a c t Article history: The vibration performance of sandwich beams with honeycomb-corrugation hybrid cores was investi- Received 10 February 2017 gated in this paper. The method of homogenization was employed to obtain the equivalent macroscopic Accepted 10 March 2017 stiffness of honeycomb-corrugation hybrid cores. Finite element methods and modal analysis techniques Available online 14 March 2017 have been used to predict their vibration characteristics (i.e. their natural frequencies and mode shapes). It is shown that in most cases the predictions by using the equivalent homogenization model (2D model) Keywords: agree well with the experimental and three-dimensional finite element calculated results. For sandwich Honeycomb-corrugation hybrid core