PURPOSE: A non-parametric numerical analysis method of a dissipative nonlinear dynamic system using response data is provided to simply and rapidly perform a numerical analysis procedure of the nonlinear dynamic system through numerical analysis by Landweber normalization of a nonlinear first integral equation transformed from a governing equation, thereby improving the accuracy of the numerical analysis. CONSTITUTION: A governing equation having a nonlinear second differential equation form is calculated about dissipative nonlinear movement of an object, and the governing equation is inputted in a computational computer. The nonlinear second differential equation form of the governing equation is transformed into a first nonlinear integral equation form. A displacement response and a speed response of the dissipative nonlinear movement of the object are measured and are inputted in the computational computer. Landweber normalization about the first nonlinear integral equation form of the governing equation is performed by operating a numerical analysis program of the computational computer. [Reference numerals] (AA) Dominant equation input stage; (BB) Integral equation conversion stage; (CC) Response data input stage; (DD) Landweber normalization stage; (EE) Stability strength calculation stage
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