BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//wp-events-plugin.com//7.2.3.1//EN
TZID:Europe/Paris
X-WR-TIMEZONE:Europe/Paris
BEGIN:VEVENT
UID:5882@i2m.univ-amu.fr
DTSTART;TZID=Europe/Paris:20221117T180000
DTEND;TZID=Europe/Paris:20221117T190000
DTSTAMP:20241120T200646Z
URL:https://www.i2m.univ-amu.fr/evenements/experimental-and-computational-
 investigation-of-aero-acoustics-of-flying-beetles/
SUMMARY:John S. Allen (University of Hawaiʻi \, Mānoa\, USA): Experimenta
 l and computational investigation of aero-acoustics of flying beetles
DESCRIPTION:John S. Allen: The Coconut Rhino Beetle is an invasive species 
 to Hawaii since 2013 and the goal of the State of Hawaii with funding from
  the US Department of Agriculture is eradicated the beetle. The beetle has
  few known predators in Hawaii and feeds upon the coconut palm trees. It h
 as been cause of devastating effects on the palm trees in Guam stripping t
 hem of their leaves and resulting the loss significant amounts of vegetati
 on. The impact on the agricultural and tourisms industries to Hawaii if th
 e invasion unmitigated could result significant financial losses. The inse
 ct burrows in the ground during the day and is only active in flight makin
 g traditional detection and tracking methods of the dispersal patterns dif
 ficult to implement. Acoustic detection for ground activity and flight off
 er potential due to relative low cost and array gain. Moreover\, tracking 
 with close proximity to traps could provide additional information on navi
 gation and flight techniques. Given that the flights of the large size Coc
 onut Rhino Beetles for specific to foraging and feeding.\nWe are able to m
 easure and analysis the time frequency characteristics of the chirp sounds
  which reveal an interesting\, novel harmonic structure not reported previ
 ously. Thee sounds from flight due to wing beat are not well understood fo
 r this invasive species. The sounds of flapping wing insects are typically
  dominated by a fundamental with higher harmonics though the underlying st
 ructure and aero-acoustics beyond the frequency and amplitude are not well
  understood\, especially for beetles. However\, the aerodynamics and acous
 tics of invasive species of beetles are of interest in terms of fundamenta
 ls of flight and detection methods. The Coconut Rhinoceros Beetle (Oryctes
  rhinoceros) and the Oriental Flower Beetle (Protaetia orientalis) were st
 udied during tethered flight with synchronized microphone array measuremen
 ts and high speed video (1000-10\,000 fps). The larger Coconut Rhinoceros 
 Beetles have fundamental ~ 50 Hz with distinctive torsional wing rotation 
 compared to Oriental Flower Beetle (~100 Hz). Computational fluid dynamics
  simulations were performed using the unsteady compressible flow solver (C
 AESIM\, Adaptive Research\, Inc.) using a high resolution (TVD) methodolog
 y. Models of the wing flapping motion were accomplished using mesh deforma
 tion techniques with the flapping following from rotation with prescribed 
 bending and coupled rotation and translation from the wing’s hinge posit
 ion. Fluid structure interaction with respect the wing’s flexibility are
  possible for extended experimental comparison.\n\nIOSSB Seminar
ATTACH;FMTTYPE=image/jpeg:https://www.i2m.univ-amu.fr/wp-content/uploads/2
 021/12/John_Allen.jpg
CATEGORIES:Interdisciplinary online seminar series on Biolocomotion
LOCATION:Virtual event\, visioconférence\, virtual\, France
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=visioconférence\, virtual\
 , France;X-APPLE-RADIUS=100;X-TITLE=Virtual event:geo:0,0
END:VEVENT
BEGIN:VTIMEZONE
TZID:Europe/Paris
X-LIC-LOCATION:Europe/Paris
BEGIN:STANDARD
DTSTART:20221030T020000
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
END:STANDARD
END:VTIMEZONE
END:VCALENDAR