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Analysis of Dynamic Contact Behavior and Optimum Design Condition of a Slider in Near-Contact regime

近接触状态滑块动态接触行为分析及优化设计条件

基本信息

批准号：
13450063
负责人：
ONO Kyosuke
金额：
$ 9.79万
依托单位：
Tokyo Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2002
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13450063/
关键词：
Heard Disk Drive Near Contact Slider Dynamic Contact Phenomenon Self-Exited Vibration Stable Flyability Contact Characteristic Friction Force Adhesive Force 磁気ディスク記録装置追従安定性磨耗耐久性高信頼摺動条件

项目摘要

1.Analys of Tracking Characteristics and Optimum Design of Tri-Pad Slider to Micro-Waviness We numerically investigated the effect of slider design parameters on the tracking ability of a tri-pad slider to micro-waviness using the distributed air bearing model and clarified optimum design of tri-pad slider.2 Evaluation of Asperity Contact and Meniscus Force in The Slider-Disk ContactIn order to evaluate stiffness of surface roughness in slider-disk contact, we developed a modified Greenwood-Williamson (GW) model including bulk deformation. As a result, we found that the contact stiffness calculated from the original GW model is valid only when the spacing between slider and disk is larger than the sum of mean value and rms value of asperity height, and that the contact stiffness in the contact regime can be regarded as linear spring.3.2-DOF Analysis of Friction-Induced Slider Vibrations in a Near-Contact ReguneIn order to investigate the severe slider vibrations and hysteresis behaviors of touch down and take-off processes in near contact regime, we numerically calculated the dynamic slider contact with disk surface by using the 2-DOF model considering the meniscus force and friction force. As a result, we could find the severe bouncing vibration of the slider is not simply periodic but contains many frequencies. From spectrum analysis of the slider vibrations up to 1 MHz, we can observe the many super harmonics. These analytical results agree well with the experimental ones.

1.三垫滑块对微波纹度的跟踪特性分析及优化设计利用分布式气浮模型，数值研究了滑块设计参数对三垫滑块对微波纹度跟踪能力的影响，阐明了三垫滑块的优化设计。2滑块-盘片接触中的粗糙度接触和弯月面力的评价为了评价滑块-盘片接触中表面粗糙度的刚度，我们发展了一个包括体变形的修正的Greenwood-Williamson（GW）模型。结果表明，由原GW模型计算的接触刚度仅在滑块与磁盘间距大于微凸体高度的均值与均方根值之和时才成立，并且接触区域中的接触刚度可以被视为线性弹簧。3.2-DOF分析近-接触区为了研究近接触区中滑块的剧烈振动和触地和起飞过程中的滞后行为，我们采用考虑弯月面力和摩擦力的2-DOF模型数值计算了滑块与磁盘表面的动态接触。结果表明，滑块的剧烈跳动不是简单的周期性振动，而是包含多种频率的振动。从高达1 MHz的滑块振动的频谱分析，我们可以观察到许多超谐波。这些分析结果与实验结果吻合得很好。