ANALYSIS AND ESTIMATION OF MODE LOCALIZATION IN MISTUNED ARCH-SUPPORTED RETICULATED SHELLS
As a new hybrid spatial structure,the arch-supported reticulated shell combines both advantages of a reticulated shell and an arch structure.A finite element model is developed to study the vibration mode localization in this structure.Effects of the stiffness detuning of the arch structures on the natural frequencies and mode shapes of the shell are investigated.The mode localization factors based on the modal strain energy are proposed to give a quantitative description of the degree of the localization.The influences of fixed end supported and fixed hinge supported boundary conditions on the mode localization factors are discussed.Analytical results indicate that the structural stiffness detuning does result in the strong mode localization phenomenon in arch-supported reticulated shell structures.The vibration localization factors based on modal strain energy can effectively estimate the degree of mode localization and help facilitate the analysis and design of such structures.
Liu Zhan-hui Gao Wei-cheng Liu Wei Cheng Xiang
Department of Astronautic Science and Mechanics,Harbin Institute of Technology,Harbin,China 150001
国际会议
The 21th International Congress on Sound and Vibration(第21届国际声与振动大会)
北京
英文
1-8
2014-07-13（万方平台首次上网日期，不代表论文的发表时间）