|
Abstract Based on the dynamic equations with fractional order(FO)，the damping-extraction method for structure- media with FO is studied. Firstly，the time domain basic formula of the damping extraction method of dynamic structure-media interaction with FO is deduced. Secondly，the uncoupled dynamic equations of dynamic structure-media interaction with fractional order are determined and then transformed into transfer functions expression according to mode transform. Thirdly，the acquired FO transfer functions are expressed as integrated order ones approximately by Oustalop differential filter algorithm. Fourthly，the all transfer functions are written as state equations form and assembled as an entity state-output equations，the corresponding interaction forces can also be solved by the four-order Runge-Kutta algorithm. Finally，two examples are utilized to demonstrate the feasibility of the proposed method.
|
|
Received: 12 November 2008
|
|
|
|
