STUDY ON THE IMPACT BEHAVIOR AND NOISE OF STEEL SLAB TO WHICH RIGID URETHANE WAS ATTACHED

粘贴硬质聚氨酯钢板冲击性能及噪声研究

基本信息

批准号：
09650522
负责人：
OKAMURA Miyoshi
金额：
$ 2.11万
依托单位：
Yamanashi University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650522/
关键词：
thin-walled steel structure rigid urethane composite structure vibration reduction effect impact behavior noise

项目摘要

The purposes of this study are to develop steel slab which is superior in vibration reduction effect and noise reduction effect. Rigid urethane is introduced as a damping material and the reduction effect of rigid urethane on local vibration and noise in steel slab are investigated. Outlines of the research result are as follows.1. Impact tests were carried out on the composite plates which were consisted of steel plate and rigid urethane. The damping constants of the composite plates and the rigid urethane were estimated. In addition, the relationship between thickness and the damping constant of the rigid urethane was clarified. Moreover, elastic impact behaviors of the composite plates were calculated by applying the discrete model which is composed of the finite strip method and the finite prism method, and the validity of the analytical method was examined.2. Natural vibration analysis and stationary vibration analysis of the composite plates were carried out. Then, the local vibration characteristics and the vibration reduction mechanism were clarified. In addition, noise reduction effect of rigid urethane was also clarified by computing the power of the vibration velocity of the surfaces of composite plates.3. Natural vibration analysis of the plate girder which was filled with rigid urethane was carried out, and the vibration characteristics of the independent modes of the rigid urethane were mainly investigated. Furthermore, the effects of the material properties of rigid urethane were also examined, and the boundary frequencies in which the independent modes of the rigid urethane occurred were clarified4. The dynamic response analysis under traveling load was carried out on steel box girder which was filled with rigid urethane. The effect of the rigid urethane on the response magnification factor was examined.

这项研究的目的是开发钢板，这在振动还原效应和降低效果方面具有优越性。将刚性的氨基甲酸酯作为阻尼材料引入，并研究了刚性尿电烷对钢板中局部振动和噪声的还原作用。研究结果的大纲如下1。在由钢板和刚性聚氨酯组成的复合板上进行了冲击测试。估计了复合板和刚性氨基甲烷的阻尼常数。另外，阐明了刚性和刚性聚氨酯的阻尼常数之间的关系。此外，通过应用由有限的剥离方法和有限的棱镜方法组成的离散模型来计算复合板的弹性影响行为，并检查了分析方法的有效性。2。进行了复合板的自然振动分析和固定振动分析。然后，阐明了局部振动特性和振动还原机制。此外，还通过计算复合板表面的振动速度的功率来阐明刚性氨基甲酸酯的降噪作用。3。进行了充满刚性尿电烷的板梁的自然振动分析，并主要研究了刚性聚氨酯模式的振动特性。此外，还检查了刚性聚氨酯的材料特性的作用，并阐明了发生刚性氨基氨烷独立模式的边界频率4。在钢制箱梁上进行了动态响应分析，该钢盒梁充满了刚性的氨基甲酸酯。检查了刚性尿电烷对响应放大因子的影响。