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首页> 外文会议>Korean Society of Noise & Vibration Control;Institute of Noise Control Engineering;International congress and exposition on noise control engineering;ASME Noise Control & Acoustics Division >Using visco-elastic damper to reduce resonant vibrations in a lightweight steel joist floor equipped with resilient ceiling
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Using visco-elastic damper to reduce resonant vibrations in a lightweight steel joist floor equipped with resilient ceiling

机译：在具有弹性天花板的轻型钢托梁地板中使用粘弹性阻尼器来减少共振

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摘要

Lightweight floor constructions often suffer from poor sound and vibration properties in thelow frequency area that are annoying to humans. The dynamic properties of the floors aresuch that they possess low, lightly damped, natural frequencies. Humans are very sensitive tothat kind of vibrations and it is of great interest to find simple methods that reduce floorvibrations and thereby increase the comfort for habitants. A lightweight steel joist floor,equipped with a resilient ceiling mounted to the floor by soft ceiling joists, serves as the testobject. By using a piece of strategically located visco-elastic material connected to the ceilingjoists, which is designed using a finite element model for an optimal position and size, it isdemonstrated that the damping of the floor is increased. The results show that resonant modesof the type where floor and ceiling are moving out of phase to each other are nearlyeliminated. Modes having floor and ceiling moving in phase to each other are less affected,although increment in damping ratio is noticeable.
机译：轻质地板结构在低频区域经常遭受不良的声音和振动特性，这使人烦恼。地板的动态特性使它们具有低，轻微阻尼的固有频率。人类对这种振动非常敏感，找到减少地板振动从而增加居民舒适度的简单方法引起人们极大的兴趣。轻质的钢托梁地板是测试对象，该地板具有通过软吊顶梁安装在地板上的弹性天花板。通过使用连接到吊顶吊架的策略性定位的粘弹性材料（使用有限元模型设计以获得最佳的位置和大小），可以证明地板的阻尼增加了。结果表明，地板和天花板异相移动的共振模式已基本消除。地板和天花板彼此同相移动的模式受到的影响较小，尽管阻尼比明显增加。

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