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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.

本研究的目的在于开发出具有上级减振降噪效果的钢板。介绍了刚性聚氨酯作为阻尼材料，研究了刚性聚氨酯对钢板局部振动和噪声的减振效果。研究结果概述如下：1.对由钢板和硬质聚氨酯组成的复合板进行了冲击试验。估算了复合材料板和刚性聚氨酯的阻尼常数。此外，还阐明了刚性聚氨酯的阻尼常数与厚度的关系。采用有限条法和有限棱柱法组成的离散模型计算了复合材料板的弹性冲击性能，验证了解析方法的有效性.对复合材料板进行了固有振动分析和稳态振动分析。阐明了局部振动特性和减振机理。另外，通过计算复合板表面振动速度的幂，也阐明了刚性聚氨酯的降噪效果.对刚性聚氨酯填充板梁进行了固有振动分析，重点研究了刚性聚氨酯填充板梁各独立模态的振动特性。此外，还研究了刚性聚氨酯材料性能的影响，并澄清了刚性聚氨酯独立模式发生的边界频率4。对刚性聚氨酯填充的钢箱梁在行车荷载作用下的动力响应进行了分析。研究了刚性聚氨酯对响应放大系数的影响。