BEGIN:VCALENDAR VERSION:2.0 PRODID:-//DTU.dk//NONSGML DTU.dk//EN CALSCALE:GREGORIAN BEGIN:VEVENT DTSTART:20180620T140000 DTEND:20180620T150000 SUMMARY:DCAMM Seminar - Simulation of nonlinear systems with random loads DESCRIPTION:

A DCAMM seminar will be presented by

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Professor Emeritus Kjell Ahlin
\nBlekinge Institute of Technology
\nBlekinge, Sweden
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Abstract:  
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\nThe seminar deals with the problem of how to calculate forced response to a mechanical system with nonlinearities. For a linear system  there are many ways to calculate the response. The approach here is to approximate the transfer function force to response with a digital filter. The filter is designed from poles and residues for the transfer function and modal superposition is used.
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\nNonlinearities may then be added to the linear system. The type of nonlinearities treated are localized, zero memory, nonlinearities.  Localized means a nonlinearity is connected from one DOF in the linear system to ground our between two DOFs. The nonlinear force in the nonlinear element should be written as a function of displacement and/or belocity for the involved DOF(s). One or many nonlinear elements may be added.
\nSeveral functions in a nonlinear MATLAB toolbox are presented together with examples of use. Some methods for identification and model parameter estimations for nonlinear systems are also shown. 
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\nDanish pastry, coffee and tea will be served 15 minutes before the seminar starts.
\n
\n

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\nAll interested persons are invited.
\n
\n

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A DCAMM seminar will be presented by

\n

Professor Emeritus Kjell Ahlin
\nBlekinge Institute of Technology
\nBlekinge, Sweden
\n
\n
\n

\n

\n\n

\n

Abstract:  
\n
\nThe seminar deals with the problem of how to calculate forced response to a mechanical system with nonlinearities. For a linear system  there are many ways to calculate the response. The approach here is to approximate the transfer function force to response with a digital filter. The filter is designed from poles and residues for the transfer function and modal superposition is used.
\n
\nNonlinearities may then be added to the linear system. The type of nonlinearities treated are localized, zero memory, nonlinearities.  Localized means a nonlinearity is connected from one DOF in the linear system to ground our between two DOFs. The nonlinear force in the nonlinear element should be written as a function of displacement and/or belocity for the involved DOF(s). One or many nonlinear elements may be added.
\nSeveral functions in a nonlinear MATLAB toolbox are presented together with examples of use. Some methods for identification and model parameter estimations for nonlinear systems are also shown. 
\n

\n

  
\nDanish pastry, coffee and tea will be served 15 minutes before the seminar starts.
\n
\n

\n

\nAll interested persons are invited.
\n
\n

URL:http://www.dcamm.dk/kalender/2018/06/seminar_no_727 DTSTAMP:20260407T090800Z UID:{D76DC9CB-7937-49D7-815D-A616A24A26C6}-20180620T140000-20180620T140000 LOCATION: Meeting Room: Eiffel (Ø30-603-2), located in the TEK Building (Building 42), SDU, University of Southern Denmark, , , , , END:VEVENT END:VCALENDAR