Fundamental Research on Damping Characteristics of Machine Structure Considering the Small Vibration Control

考虑小振动控制的机械结构阻尼特性基础研究

• 批准号: 07650160
• 负责人: HASHIMOTO Masatoshi
• 金额: $ 1.47万
• 依托单位: Toyota National College of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650160/
• 关键词: damping characteristic; machine structure; vibration; vibration control; vibratory characteristic; packing density; 微小振動; 接触剛性

This research aims at the small vibration control of the machine structure. The machine structure combines some components, so it is important for improving the damping characteristic of the structure to examine the contact mechanism between these materials. Then, the structural material is fixed between the holder blocks with the precise machine vise, and the damping behavior and the contact rigidity are examined when the impulse input is added. In the next place, the damping characteristic is examined experimentally when grains are inserted into the hollow part of the structure. First of all, the hollow structure or the grain-inserted structure is excited with the impact hammer, and the damping behavior is estimated from the response wave form. Furthermore, the vibration characteristic is examined by the sine wave-excitation method.As a result, the contact rigidity and the damping characteristic of the grain-inserted structure are obtained from these experiments. First of all, the damping characteristic in the contact part changes by the input and the clamping load, and it has been understood that the optimum clamping condition is existed judging from the damping characteristic. Moreover, the damping characteristics of the grain-inserted structure are influenced by the kind of the grain material, the grain size, and the packing density of the grains. Especially, when the ceramics grains are inserted, the damping characteristic has been greatly improved. In addition, it has been understood that the vibration characteristic is greatly improved by the inserted material, the grain size, and the packing density of the grains.This research is scheduled to examine the more detailed examination based on these results for the future.

本研究针对机械结构的微小振动控制展开研究。机械结构是由多个部件组合而成的，因此研究这些材料之间的接触机理对于提高结构的减振性能具有重要意义。然后，用精密机床虎钳将结构材料固定在夹持块之间，并在增加脉冲输入的情况下检查其减振性能和接触刚度。其次，通过实验考察了在结构的空心处插入颗粒时的减振特性。首先，利用冲击锤对空心结构或镶嵌颗粒结构进行激励，根据响应波形判断结构的减振性能。在此基础上，采用正弦波激振法对结构的振动特性进行了测试，得到了插粒结构的接触刚度和减振特性。首先，接触部分的阻尼特性随输入和夹紧载荷的变化而变化，从阻尼特性可以看出存在最佳的夹紧条件。此外，颗粒材料的种类、颗粒的尺寸和颗粒的堆积密度都会影响颗粒插入结构的减振特性。尤其是陶瓷颗粒的加入，使材料的减振性能得到了很大的改善。此外，据了解，插入材料、颗粒大小和颗粒的堆积密度大大改善了振动特性。本研究计划在未来基于这些结果进行更详细的检查。