噪声与振动控制2011，Vol.32Issue(6)：47-52,6.DOI:10.3969/j.issn.1006-1355-2011.06.011
计算粘弹结构动力学参数的新模态应变能方法
A New Modal Strain Energy Method for Analyzing Dynamic Parameters of Viscoelastic Structures
摘要
Abstract
Although viscoelastic structures have been widely used for vibration and noise reduction in the field of aerospace engineering, accurate calculation for dynamic parameters of viscoelastic structures remains difficult problem. Modal strain energy method and the corresponding modified methods have been always used for approximate calculations. On the basis of analysis of the priciples of existing modal strain energy methods and their correlations, a new modal strain energy method, whose correction factor varies with the amplitude of modal loss factor, is proposed for computing loss factor and natural frequency of viscoelastic structures. A four parameter prototype system, which is equivalent to beams and plates with constrained layer damping, and a new high damping spacecraft isolator are taken as example to verify accuracy of the proposed method by comparisons.关键词
振动与波/粘弹性/模态应变能/损耗因子/固有频率Key words
vibration and wave / viscoelastic/ modal strain energy / loss factor/ natural frequency分类
通用工业技术引用本文复制引用
李世其,张针粒,朱文革,王跃..计算粘弹结构动力学参数的新模态应变能方法[J].噪声与振动控制,2011,32(6):47-52,6.基金项目
科技重大专项课题(2010zx04008-041) （2010zx04008-041）
