(College of Mechanical and Electrical Engineering, Central South University, Changsha 410083，China)
Keywords:
-
CLC:
PACS:
-
DOI:
-
DocumentCode:
Abstract:
Mathematical model of quenching residual stress filed of 7075 aluminum alloy thick plate was established to theoretically and experimentally analyze the influences of quenching residual stress on plate natural frequency during VSR. The results show that plate natural frequency, based on constant physical material characteristics like dimension, density and homogeneity, etc, is mainly influenced by the residual stress distribution characteristics while quenching residual stress always increases plate natural frequency. And the higher the rank number is, the larger the influence of residual stress on frequency is. Moreover, natural frequency in each order would decrease following residual stress relaxation or homogenization caused by stress re distribution during VSR.