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DEVELOPMENT OF TECHNIQUE FOR DAMPING CAPACITY IMPROVEMENT BY COMPOSITE SURFACE STRUCTURE

复合表面结构提高阻尼能力的技术开发

基本信息

批准号：
12650141
负责人：
MARUI Etsuo
金额：
$ 2.24万
依托单位：
Gifu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2002
项目状态：
已结题

项目摘要

Sheet structures in machines often vibrate violently during operation. Some techniques for damping capacity improvement to prevent such vibration are developed in this research. They are very simple and do not require much money.Firstly, a differential equation system representing a structure model in which double-sided adhesive tape is applied on sheet surfaces is introduced. Here, a free dumped vibration is treated. From the solution of this equation system, the effectiveness of applied adhesive tape on damping capacity improvement is proved and the characteristic of the applied adhesive tape is clarified. An important characteristic of applied adhesive tape is the resistance against shearing deformation. We named this characteristic as shearing strain velocity coefficient (SSVC).Then, damping characteristic of actual sheet structures is measured and its improvement by adhesive tape application is recognized in experiment. By combining both the experimental and theoretical results, S … More SVC can be estimated. Such estimation is obtained in the dynamic state of the model structure.Some experiments to clarify SSVC directly have been carried out. Only a characteristic value for static state is obtained, because a small shearing strain velocity range is realized in our experimental apparatus. However, good linearity between the dynamic estimation and the static estimation is recognized. It is clarified that an adhesive tape having large static SSVC is effective for large damping capacity improvement.Above results are obtained in indicial response test. Then, the effectiveness against forced vibration is separately examined. Structure directly contacts the accelerating point, and friction force acting on this point has a large influence on the level of damping capacity improvement. It is clarified that damping capacity is slightly improved also in forced vibration.In the last experiment, the effectiveness of electroless plating film on damping capacity improvement is examined. Any types of electroless plating film can improve damping capacity. Damping capacity is greatly improved by the plating film dispersed with hard foreign small particles such as SiC. Less

机器中的薄板结构在运行过程中经常发生剧烈振动。本研究提出了一些改善阻尼能力的技术，以防止这种振动。它们非常简单，不需要太多的钱。首先，一个微分方程组表示的结构模型，其中双面胶带施加在纸张表面。这里，处理自由倾倒的振动。通过对该方程组的求解，证明了粘贴胶带对提高阻尼性能的有效性，并阐明了粘贴胶带的特性。所应用的胶带的一个重要特性是抗剪切变形。在此基础上，对实际薄板结构的阻尼特性进行了测试，并通过实验验证了粘贴胶带对薄板结构阻尼特性的改善作用。通过结合实验和理论结果，S ...更多信息 SVC是可以估计的。这种估计是在模型结构的动态状态下得到的，并进行了一些直接澄清SSVC的实验。由于我们的实验装置实现了一个小的剪切应变速度范围，所以只得到了静态的特征值。然而，在动态估计和静态估计之间的良好线性度是公认的。说明了具有较大静态SSVC的胶带对大阻尼性能的改善是有效的，上述结果是在指数响应试验中得到的。然后，对强迫振动的有效性分别进行了检查。结构与加速点直接接触，作用在加速点上的摩擦力对阻尼能力的提高程度有很大影响。在最后一个实验中，检验了化学镀膜对阻尼性能改善的有效性。任何类型的化学镀膜都可以提高阻尼能力。通过分散有诸如SiC的硬外来小颗粒的镀膜，阻尼能力大大提高。少