BEGIN:VCALENDAR

VERSION:2.0

PRODID:-//wp-events-plugin.com//6.6.4.4//EN

TZID:Asia/Jerusalem

X-WR-TIMEZONE:Asia/Jerusalem
BEGIN:VEVENT

UID:0-518@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20150722T163000

DTEND;TZID=Asia/Jerusalem:20150722T173000

DTSTAMP:20230603T192823Z

URL:https://aerospace.technion.ac.il/events/limit-cycle-oscillations-of-a-
 pre-tensed-membrane-strip/

SUMMARY:Limit-Cycle Oscillations of a Pre-tensed Membrane Strip
DESCRIPTION:Lecturer:Ariel Drachinsky (Arik)\n Faculty:Department of Aerosp
 ace Engineering\n Institute:Technion – Israel Institute of Technology\n 
 Location:Classroom 165\, ground floor\, Library\, Aerospace Eng.\n Zoom: \
 n Abstract: \n Details: \n The seminar will present a computational and ex
 perimental study of the nonlinear aeroelastic behavior of a pre-tensed\, h
 igh aspect-ratio\, thin membrane strip. The goal of the study is to derive
  and validate a computational model that can be used for analysis and desi
 gn of membrane strips\, for the purpose of energy harvesting from flutter 
 at low airspeeds.  The mathematical model is based on a pre-tensed-beam m
 odel\, accounting for bending and torsional stiffening effects due to pret
 ension and large deformations. The aerodynamic model is a potential flow m
 odel. The equations of motion are written as a set of nonlinear ordinary d
 ifferential equations\, using Galerkin’s method\, and are simulated nume
 rically. The nonlinear aeroelastic model is used to study the oscillation 
 characteristics of the membrane strip in the various stability regions. Th
 e effects of initial pretension and non-linear stiffening on energy-harves
 ting potential of the system are studied. The combined effect of the prelo
 ad on the flutter onset speed\, on the flutter frequency and amplitude\, a
 nd on the loss of orbital stability\, indicates that an optimal preload ca
 n be determined based on the intended airspeed range for energy harvesting
 . A series of wind tunnel tests was conducted\, in which the flutter onset
  velocity\, and the post-flutter frequencies and amplitudes were measured.
  Good agreement between the experimental data and computational results va
 lidate the computational model.
CATEGORIES:Seminars
LOCATION:Classroom 165\, ground floor\, Library\, Aerospace Eng.

END:VEVENT

BEGIN:VTIMEZONE

TZID:Asia/Jerusalem

X-LIC-LOCATION:Asia/Jerusalem

BEGIN:DAYLIGHT

DTSTART:20150327T030000

TZOFFSETFROM:+0200

TZOFFSETTO:+0300

TZNAME:IDT

END:DAYLIGHT

END:VTIMEZONE
END:VCALENDAR