噪声与振动控制2017，Vol.37Issue(4)：40-46,7.DOI:10.3969/j.issn.1006-1355.2017.04.009
含裂纹功能梯度材料梁结构的振动功率流特性分析
Vibrational Power Flow Analysis of the Functionally Graded Beam with an Open Crack
摘要
Abstract
Functionally graded material (FGM) beams are more and more widely used in engineering. But, the existence of cracks in the beams will affect its local stiffness and some other properties and then change its vibration and wave propagation characteristics. In this paper, the wave propagation and power flow of a FGM beam with an open crack are studied. The flexibility of the crack is deduced by using the rotational spring model. The governing differential equations of the infinitely long functionally graded beam are established and its vibration characteristics are obtained by using the wave propagation method with the continuity conditions. The input power flow and transmission power flow of the intact and the cracked beams are calculated. The influences of material gradient, excitation frequency, crack location and crack size on the input power flow and transmission power flow are studied. This work provides the basis for future study on the damage identification of FGM structures.关键词
振动与波/功能梯度材料梁/裂纹/转动弹簧/振动功率流Key words
vibration and wave/functionally graded material (FGM) beam/crack/rotational spring model/vibrational power flow分类
建筑与水利引用本文复制引用
衡星,朱翔,李天匀,王迪..含裂纹功能梯度材料梁结构的振动功率流特性分析[J].噪声与振动控制,2017,37(4):40-46,7.基金项目
国家自然科学基金资助项目(51479079) （51479079）
