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  • Công bố khoa học và công nghệ Việt Nam

27.17

Toán học và thống kê

Về sự hội tụ của phương pháp xấp xỉ liên tiếp kết hợp để giải phương trình Duffing

On the convergence of a coupling successive approximation method for solving Duffing equation

Vietnam Journal of Mechanics

2014

3

185-200

0866-7136

General Duffing equations occur in many problems of Mechanics and Dynamics. These equations include nonlinear terms of second an third order, their coefficients are finite but not small parameters. For finding analytical approximate solutions of the general Duffing equation the coupling successive approximation method (CSAM) has been proposed by the authors. In the present paper the convergence of mentioned method is proven and a condition relating coefficients of Duffing equation to provide ithe convergence procedure is formulated. Emphasize that the assumption of small parameters is not used in the proving. Some examples are presented to illustrate the proposed method, particularly exact solutions of some problems are compared with analytical approximate ones found by CSAM.

TTKHCNQG, CVv 50