Study on Vibration and Noise Reduction Induced by Friction Force

摩擦力减振降噪研究

基本信息

  • 批准号:
    15360121
  • 负责人:
  • 金额:
    $ 6.98万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
  • 财政年份:
    2003
  • 资助国家:
    日本
  • 起止时间:
    2003 至 2005
  • 项目状态:
    已结题

项目摘要

This research deals with the vibration and noise reduction induced by the friction between surfaces of elastic structures. It is well known that the friction force may induce self-excited vibration in dynamic systems caused by the apparent negative damping of the system. Once it happens, it is very difficult to reduce the amplitude of vibration and it is sometimes followed by the destruction of the system itself. In the case when there is no destruction of the system, it makes large noise uncomfortable for the people around it. So it is important to study the mechanism of friction vibration to reduce its amplitude and noise.Self-excited vibration and stick-slip phenomena are main target of this study. Though stick-slip phenomenon is usually considered as self-excited vibration, they differ to each other. Stick-slip is typically caused by the difference of static friction force and dynamic one. On the other hand, self-excited vibration is defined to be caused by negative damping of the … More system. It may be confusing that stick-slip phenomena are sometimes found in the dynamic system having equivalent negative damping.In order to avoid the stick-slip phenomena, one of the effective ways is to decrease the difference between the static and dynamic friction force. Automatic Transmission Fluid (ATF) has been developed for this purpose and various kinds of Friction Modifier (FM) are blended. Even applying FM to the system which has the possibility to show the stick-slip phenomena, it may be deteriorated after long interval. When the noise is caused mainly by the out-of-plane vibration of friction plates, it may be effective for noise reduction that the distance from the friction surface to the neutral plane of the plate should be decreased. The best condition is coinciding the two planes each other. This trial was conducted by small size model, and it showed remarkable decrement of amplitude of the friction plates. But it should be noted that the vibration energy was transmitted to the other elastic components of the system, and noise was made by other part of the system. In such cases, the vibration amplitude should be decreased by absorbers.MR fluid is one of the functional fluids, and it has been successfully applied to controllable dampers. The investigators proposed to design MR devices considering the flow patterns of MR fluid in the mechanical components. As described above, one of the best ways for vibration and noise reduction is to apply dampers to the friction system, but the experimental verification of this idea to the system may be conducted in the near future. Less
本文研究弹性结构表面摩擦引起的振动和噪声的降低。众所周知,摩擦力会在动力系统中诱发自激振动,这是由于系统的表观负阻尼引起的。一旦发生这种情况,很难降低振动的振幅,有时会导致系统本身的破坏。在系统没有受到破坏的情况下,摩擦振动会产生很大的噪声,使周围的人感到不舒服,因此研究摩擦振动的机理,降低其振幅和噪声是非常重要的,自激振动和粘滑现象是本文研究的主要对象。虽然粘滑现象通常被认为是自激振动,但它们是不同的。粘滑现象是由静摩擦力和动摩擦力的差异引起的。另一方面,自激振动被定义为由振动的负阻尼引起的。 ...更多信息 系统在具有等效负阻尼的动力学系统中,有时会出现粘滑现象,这可能会引起混淆,为了避免粘滑现象,有效的方法之一是减小动静摩擦力之差。自动变速器油(ATF)就是为此目的而开发的,它混合了各种摩擦改进剂(FM)。即使将FM应用于有可能表现出粘滑现象的系统,在长时间间隔后也可能恶化。当噪声主要是由摩擦片的面外振动引起时,减小摩擦面到摩擦片中性面的距离可能是降低噪声的有效方法。最佳条件是两个平面重合。本试验是在小尺寸模型上进行的,结果表明摩擦片的振幅有明显的减小。但应该注意的是,振动能量被传递到系统的其他弹性部件,并且噪声由系统的其他部分产生。磁流变液作为一种功能流体,已成功地应用于可控阻尼器中。研究者建议设计MR器械时考虑MR流体在机械组件中的流动模式。如上所述,减少振动和噪音的最佳方法之一是将阻尼器应用于摩擦系统,但在不久的将来可能会对该系统进行实验验证。少

项目成果

期刊论文数量(14)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
MR流体の利用形態を考慮した基本特性の測定とそのMR流体機器設計への応用
考虑其使用形式的磁流变流体基本特性测量及其在磁流变流体设备设计中的应用
Vibration of Separator Plate in Wet Friction Systems with Paper-Based Materials
纸基材料湿摩擦系统中隔板的振动
湿式摩擦による振動の発生機構に関する研究
湿摩擦振动产生机理研究
Vibration in Wet Friction Systems with Paper-Based Material
纸基材料湿摩擦系统中的振动
Vibration Mechanism Induced by Wet Friction System
湿摩擦系统引起的振动机理
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MORISHITA Shin其他文献

MORISHITA Shin的其他文献

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{{ truncateString('MORISHITA Shin', 18)}}的其他基金

Controllable damping element for micro spring-mass vibration system by electric field
电场控制微弹簧-质量振动系统阻尼元件
  • 批准号:
    26630077
  • 财政年份:
    2014
  • 资助金额:
    $ 6.98万
  • 项目类别:
    Grant-in-Aid for Challenging Exploratory Research
Natural Vibration Analysis of membrane protein and applicability to micro-sensor
膜蛋白的自然振动分析及其在微传感器中的适用性
  • 批准号:
    25630076
  • 财政年份:
    2013
  • 资助金额:
    $ 6.98万
  • 项目类别:
    Grant-in-Aid for Challenging Exploratory Research
Optical Damping Mechanism by LAZER on a Micro Vibration System
LAZER 在微振动系统上的光学阻尼机制
  • 批准号:
    24656155
  • 财政年份:
    2012
  • 资助金额:
    $ 6.98万
  • 项目类别:
    Grant-in-Aid for Challenging Exploratory Research
Adaptive Vibration Control with Magneto-Rheological Gel Damper
使用磁流变凝胶阻尼器的自适应振动控制
  • 批准号:
    21360107
  • 财政年份:
    2009
  • 资助金额:
    $ 6.98万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Study on the Dynamic Properties of Living-Cells from the viewpoint of Intelligent Vibration-Reducible Structure
从智能减振结构角度研究活细胞的动态特性
  • 批准号:
    18360111
  • 财政年份:
    2006
  • 资助金额:
    $ 6.98万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Intelligent Vibration Control System with Actuators using MR Fluid
带有使用 MR 流体的执行器的智能振动控制系统
  • 批准号:
    12450096
  • 财政年份:
    2000
  • 资助金额:
    $ 6.98万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Intelligent Vibration Control System by a Variable-damping Dynamic Absorber Using ER Fluid
使用 ER 流体的可变阻尼动态吸振器的智能振动控制系统
  • 批准号:
    10650235
  • 财政年份:
    1998
  • 资助金额:
    $ 6.98万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Directionally Controllable Squeeze Film Damper Using Liquid Crystal
使用液晶的定向可控挤压油膜阻尼器
  • 批准号:
    07650278
  • 财政年份:
    1995
  • 资助金额:
    $ 6.98万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
ER Fluid Application to a Controllable Mount
ER 流体应用于可控安装
  • 批准号:
    05650231
  • 财政年份:
    1993
  • 资助金额:
    $ 6.98万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
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