New insights in a 2-D hard disk system under a temperature gradient

2011 ◽  
Author(s):  
J. J. del Pozo ◽  
C. Pérez-Espigares ◽  
P. I. Hurtado ◽  
P. L. Garrido
Keyword(s):  
Temperature Gradient ◽  
Hard Disk ◽  
Disk System

scholarly journals Kosterlitz-Thouless-type caging-uncaging transition in a quasi-one-dimensional hard disk system

2020 ◽  
Vol 2 (3) ◽  
Author(s):  
A. Huerta ◽  
T. Bryk ◽  
V. M. Pergamenshchik ◽  
A. Trokhymchuk
Keyword(s):  
Hard Disk ◽  
Disk System ◽  
One Dimensional

Study of the hard-disk system at high densities: the fluid-hexatic phase transition

2018 ◽  
Vol 148 (23) ◽  
pp. 234502 ◽  
Author(s):  
Luis Mier-y-Terán ◽  
Brian Ignacio Machorro-Martínez ◽  
Gustavo A. Chapela ◽  
Fernando del Río
Keyword(s):  
Phase Transition ◽  
Hard Disk ◽  
Disk System ◽  
Hexatic Phase

scholarly journals Stochastic Geometry and Hard-Disk System

1973 ◽  
Vol 49 (3) ◽  
pp. 1044-1045
Author(s):  
Tohru Ogawa ◽  
Masaharu Tanemura
Keyword(s):  
Stochastic Geometry ◽  
Hard Disk ◽  
Disk System

Operational Shock Response of Ultrathin Hard Disk Drives

2014 ◽  
Author(s):  
Shengkai Yu ◽  
Jianqiang Mou ◽  
Wei Hua ◽  
Weidong Zhou ◽  
Chye Chin Tan
Keyword(s):  
Hard Disk Drives ◽  
Hard Disk ◽  
Element Model ◽  
System Level ◽  
Disk Drives ◽  
Disk System ◽  
Shock Response ◽  
Shock Simulation ◽  
Resistance Performance ◽  
Operational Shock

Operational shock is one of key challenges for designing the ultrathin mobile hard disk drives (HDDs) due to the reduced thickness of mechanical components and their stiffness. Some simplifications in the conventional methods for operational shock simulation are not valid. In this paper, a method for system level modelling and simulation of operational shock response of HDDs has been proposed by coupling the structural finite element model of the HDD and the air bearing model. The dynamic shock response of the head-disk system in a 5 mm ultrathin HDD design is investigated. The effects of drive base stiffness, disk-ramp contact, disk spinning and disk distortion have been studied. The results reveal that the drive base deformation and ramp contact are critical for the operational shock resistance performance of ultrathin drives.

Vibration Characteristics of a Rotor-Flexible Disk System: In Case of HDD Spindle-Motor System

1999 ◽  
Author(s):  
D. C. Han ◽  
S. H. Choi ◽  
K. B. Park ◽  
S. C. Jung
Keyword(s):  
Hard Disk Drive ◽  
Hard Disk ◽  
Disk Drive ◽  
Spindle Motor ◽  
Vibration Characteristics ◽  
Rotating Shaft ◽  
Disk System ◽  
Assumed Mode Method ◽  
Mode Method ◽  
Flexible Disk

Abstract In this paper we investigate the vibration characteristics of a rotor system with flexible disks. The coupled vibration mode between rotating shaft and the flexible disk are analyzed for lateral and axial vibrations respectively. Gyro and sheer effects are considered for the modeling of lateral vibrations. An assumed mode method was used for the disk modeling considering gyro effects. For a numerical example hard disk drive is considered. The natural frequencies of the motor-spindle system with flexible disk of hard disk drive was calculated and compared to the experimental data.

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