Black Hawk helicopter vibration analysis due to main rotor damage : directional constituents of the resultant vibrations / by Joseph C. Fries.

Format:

Book

Government document

Author/Creator:

Fries, Joseph C.

Contributor:

U.S. Army Research Laboratory

Series:

ARL-TR (Aberdeen Proving Ground, Md.) ; 2442.

ARL-TR ; 2442

Language:

English

Subjects (All):

Black Hawk (Military transport helicopter).

Vibration (Aeronautics)--Physiological effect.

Vibration (Aeronautics).

Rotors (Helicopters).

Physical Description:

1 online resource (viii, 16 pages) : illustrations

Place of Publication:

Aberdeen Proving Ground, MD : U.S. Army Research Laboratory, [2001]

Summary:

Black Hawk helicopter cockpit vibrations due to main rotor damage are presented based upon an analysis and computer code originally developed in-house in the Air Systems Branch (ASB) of the U.S. Army Research Laboratory (ARL). Ballistic damage is simulated by removing various amounts of the outer radius of one blade of the rotor set of four blades. This simulated blade damage causes the rotor to be unbalanced allowing undesirable vibrations to he transmitted into the fixed-system airframe. This work considers the longitudinal, lateral, and vertical cockpit amplitude and phase components of the vibrations that make up the total vector vibrations that a cockpit occupant would feel. If the vibrations are severe enough, they could lead to attrition of the aircraft. This vibration data can be used in conjunction with historical human-vibration-tolerance data for later work toward determining a pilot's capability to function in the helicopter cockpit vibration environment.

Notes:

Title from title screen (viewed on February 3, 2011).

"March 2001."

Includes bibliographical references (page 9).

OCLC:

227960512

Access Restriction:

Approved for public release.