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首页> 外文会议>ASME(American Society of Mechanical Engineers) Pressure Vessels and Piping Conference 2006 vol.4 pt.A: Fluid-Structure Interaction >STRUCTURAL DYNAMICS AND RESPONSE OF ROOF TILES UNDER WIND LOADING
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STRUCTURAL DYNAMICS AND RESPONSE OF ROOF TILES UNDER WIND LOADING

机译：风荷载作用下屋顶瓦片的结构动力学和响应

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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 vibrations for the roof tiles were measured by the Laser Doppler Vibrometry and the accelerometer, and the practical natural frequencies of the roof tiles were analyzed by the impulse force hammer test method. 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 similar to 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. The values of the frequencies for the oscillating relate to the values of natural frequencies of the vibration.
机译：对全尺寸屋面瓦模型的振动和散射行为进行了一系列的风洞测试，该模型广泛用于日本木结构房屋的屋面。这项研究调查了屋顶瓦的振动和散射行为的性质和来源，目的是为该机理提供更好的见识。在风洞流下游的倾斜屋顶上安装了屋顶瓦片。用激光多普勒振动计和加速度计测量屋面瓦的振动，并通过脉冲力锤试验法分析屋面瓦的实际固有频率。高速摄像机观察到振动和散射的运动。基于对测量结果的考虑，存在一种基本机制，该机制可能导致屋顶砖的流动引起的振动。这种机制类似于所谓的颤动不稳定性，其表现为在特定临界流速下，结构自然模式下的自激振荡。振荡频率的值与振动的固有频率的值有关。

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