动态弹性模量随频率变化的理论模型及机理

Theoretical Model and Mechanism of Dynamic Modulus of Elasticity with Frequency Change

对混凝土加质量块悬臂梁结构、三种不同比尺的纯悬臂梁及加质量块的石膏悬臂梁结构做了振动实验，根据材料前四阶的振型动态弹性模量和非振型动弹模（ 包括从材料的静弹模到一阶振型动弹模以及在各阶共振频率之间的非振型动弹模） 随频率变化的结果，建立理论模型．并对动弹模随频率变化的规律和机理进行了探讨．

A theoretical model is proposed for the change of first four order modal and no modal dynamic moduli of elasticity of a concrete cantilever with block and for gypsum cantilevers to three different scales with and without block. The no modal moduli including moduli between static modulus of elasticity and the first order moduli and moduli among the different order moduli, and the law and mechanism of the change are discussed.