hard disk

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hard disk

a data storage device in which data is stored on a magnetic disk embodied in a COMPUTER. Most hard disks can store large amounts of data, such as 20 megabytes of numbers or letters.
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Assuming there are Nb blades evenly distributed on the rigid disk, so the disk-blade system is a circular symmetrical structure.
Liu, "Rocking vibrations of rigid disk on saturated poroelastic medium," Soil Dynamics and Earthquake Engineering, vol.
The model consists of a rotor treated as a continuous elastic shaft with several rigid disks, supported on the bearings with a non-linear behavior.
The demise of the leading firms of each generation seems to have been triggered by the emergence of new product architectures and of new market segments in which these architectures were used.(2) This history of the rigid disk drive industry therefore is focused on the emergence of these new technologies and markets.
Because of omitting the mistuning effects, an idealized perfectly tuned model of system, which contains of a cyclic chain of N identical, identically coupled blades that are uniformly attached to a rigid disk, is considered.
Last month, my column discussed the serious growth of rigid disk drives as a primary backup device, displacing tape technologies.
With the rigid disk, data are stored in concentric tracks in magnetic material deposited on one or both surfaces of a thin aluminum platter.
Typical of rugged, rigid disk systems for military computing applications is the RDS-7652R series produced by Miltope Corp.
4 shows the dynamic model of the motorized spindle which is treated as a rotor-bearing system with multiple rigid disks and bearings.