Roller doors are popularly used in cities due to their compact design, low cost, and ease of use. However, roller doors are made of thin metal sheets and have low inherent damping, which causes roller doors in their closed configuration to experience strong vibration when subjected to external excitations, such as wind and passing vehicles. These vibrations also result in severe noise radiation. It is therefore necessary and important to minimize the vibrations and the noise emanating from the roller doors. This research develops a novel application method to suppress the vibration of existing roller doors and to mitigate the induced noise, and the main principle is using the high damping property of viscoelastic materials through retrofit to increase the damping of the roller door. The key component of the retrofit is a viscoelastic stripe of three layers: a self-adhesive layer, a viscoelastic layer and a constraining metallic layer. The proposed method can be easily applied to the existing roller doors and has nearly no negative impact on its daily usage. To validate the feasibility of this method, shaking table tests were conducted and investigated on a roller door model with and without viscoelastic retrofit, and the experimental results demonstrate that the proposed retrofit method can effectively mitigate the vibration and therefore reduce the induced noise for an existing roller door.

中文翻译：

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通过实验验证使用粘弹性材料减振改造现有卷帘门的新方法

卷帘门由于其紧凑的设计、低成本和易用性而在城市中广泛使用。然而，卷帘门由薄金属板制成，固有阻尼低，这会导致卷帘门在关闭配置时受到外部激励（例如风和过往车辆）的强烈振动。这些振动还会导致严重的噪声辐射。因此，将卷帘门发出的振动和噪音降至最低是必要且重要的。本研究开发了一种新的应用方法来抑制现有卷帘门的振动并减轻感应噪声，其主要原理是通过改造利用粘弹性材料的高阻尼特性来增加卷帘门的阻尼。改造的关键部件是三层粘弹性条纹：自粘层、粘弹性层和约束金属层。所提出的方法可以很容易地应用于现有的卷帘门，并且对其日常使用几乎没有负面影响。为了验证该方法的可行性，在有和没有粘弹性改造的卷帘门模型上进行了振动台试验和研究，实验结果表明，所提出的改造方法可以有效地减轻振动，从而降低现有的感应噪声。卷帘门。