Researches on Vibration and Scattering of Roof Tiles by Wind Tunnel Test

A series of wind tunnel tests was conducted on the vibration and scattering behavior of full-sized model of roof tiles, which were used widely for roofings of Japanese wooden dwellings. This study has investigated the nature and source of the vibrating and scattering behavior of roof tiles with the...

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Veröffentlicht in:Nihon Kikai Gakkai rombunshuu. B hen 2005/10/25, Vol.71(710), pp.2407-2413
Hauptverfasser: NANBA, Reiji, OKAMOTO, Satoru, SHIBAO, Kaneo, SATOU, Masami, SHIBAO, Yoshihide
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container_end_page 2413
container_issue 710
container_start_page 2407
container_title Nihon Kikai Gakkai rombunshuu. B hen
container_volume 71
creator NANBA, Reiji
OKAMOTO, Satoru
SHIBAO, Kaneo
SATOU, Masami
SHIBAO, Yoshihide
description A series of wind tunnel tests was conducted on the vibration and scattering behavior of full-sized model of roof tiles, which were used widely for roofings of Japanese wooden dwellings. This study has investigated the nature and source of the vibrating and scattering behavior of roof tiles with the aim of providing a better insight to the mechanism. The roof tiles were set up on the pitched roof in the downstream of the flow from the wind tunnel. The vibration of the roof tiles was measured by the Laser Doppler Vibrometry and the accelerometer, and the practical natural frequency of the roof tiles was analyzed by the method of impulse force hammer test. The motions of the vibration and scattering were observed by the high-speed video camera. Based on the consideration on the results of the measurements, there is a basic mechanism which can lead to flow-induced vibrations of the roof tiles. This mechanism is that of the so-called fluttering instability, which appears as the self-excited oscillation in the natural mode of the structure at the certain critical flow speed. It is concluded that the values of frequencies of the forced vibration for the fluttering coincide nearly with the values of natural frequencies.
doi_str_mv 10.1299/kikaib.71.2407
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subjects Flow Induced Vibration
Flow Measurements
Roof Tiles
Vibration and Scattering
Wind Tunnel Test
title Researches on Vibration and Scattering of Roof Tiles by Wind Tunnel Test
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