Most of current corrected panel methods failed to correct out-of-phase part of distributed unsteady pressure. A method combining traditional downwash weighting method and successive kernel expansion is developed. Precision of the method is verified with an example on ONERA M6 wing. Based on modified aerodynamics,flutter boundary of wing is calculated which predicts well nonlinear flutter of wing in transonic regime.

In this paper, an universial program for the simulation of elastic waves were developed by adding some treatment routines of artificial boundary conditions to the famous program of SAP5 and its micro-computer version SAP5P. The numerical results presented show that the program simulated the propagation of elastic waves in the uniformly elastic media quite well.