Division 508. Department of Flight Vehicle Design and Applied Mechanics, Peking University ofAeronautics and Astronauties, Beijing 100083, P. R. China;
2.
North China Electric Power University, Beijing 102206, P. R. China
Differential equations of free forced vibrations of one-way rectangular stepped thin plated on Winkler's foundation are established by using singular functions,their general solutions are solved:exprssion of vibration mode function and frequency equations on usual supports are derived from Woperator:forced responses of such plates under different-type loads are discussed with generalized functions.