1. Shenyang Aerospace University, Liaoning Province Key Laboratory of Advanced Measurement And Test Technology of Aviation Propulsion Systems Liaoning, Shenyang, 110136
Abstract：With the improvement of the advanced aircraft performance, they are facing increasingly severe aerodynamic heating, noise, mechanical load and so on, in which the role of complex loads will lead to nonlinear vibration characteristics. Especially, aerodynamic heating from supersonic flight induced elevated temperatures that affected material selection and significantly altered structural design practices, thermal gradients and restrained thermal expansion also introduced thermal buckling phenomenon. Considering the influence of thermo-acoustic loadings, vibration characteristics of simply supported plate under thermal loadings with temperature gradient and random acoustic loadings are investigated. According to nonlinear large deflection governing equations for isotropic thin-walled structures undergoing thermo-acoustic loadings, modal frequencies simply supported plates, and thermal buckling temperature difference of simply supported plates with temperature gradient were derived. Dynamic stress response of simply supported plates under thermo-acoustic loadings were calculated before and after thermal buckling, Probability density, and power spectral density, root mean square for the stress were statistically analyzed in details.
2014, Vol. 33 
