Analysis of Dynamic and Acoustic Radiation Characters for a Flat Plate Under Thermal Environments

摘要: A study on vibration and acoustic radiation characters of an isotropic rectangular thin plate under thermal environments is presented in this paper. It assumed that loads caused by just change the structure stress state. Thermal stresses induced uniform temperature rise are determined with thermo-elastic theory. Then state used following dynamic analysis as a pre-stressed factor. observed influence natural frequencies evidently, especially fundamental frequency. The order mode shapes stays same. Dynamic response peaks float to lower frequency range increment temperature. Acoustic efficiency subjected decreases mid-frequency band. For validation, numerical simulations also carried out. can be found combined approach finite element method (FEM) boundary (BEM) more appropriate for problems.