1973-02-01

Control of Helicopter Vibration Using the Dynamic Antiresonant Vibration Isolator 730892

Helicopters characteristically exhibit large amplitude vibration at low frequencies, often caused by the main rotor-induced shears and moments. To reduce these vibrations, the rotor is designed to minimize the induced shears and moments, and the fuselage is designed to be free of resonance at the frequencies of these rotor-induced inputs. Also, many helicopters employ vibration mitigation devices.
Under the sponsorship of Eustis Directorate, Kaman Aerospace has conducted experimental and analytical studies of the Dynamic Antiresonant Vibration Isolator (DAVI), an inertially coupled isolation device which permits a high degree of isolation at discrete low frequencies without sacrifice of elastic stiffness.
The principles upon which the DAVI is based and laboratory test results are presented to show the independence of DAVI isolation from the weight of the isolated item. The application of the DAVI to crew seat isolation is also discussed. A summary of the work done on the application of the DAVI to helicopter rotor isolation, including results of analysis and testing, is presented.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Interior Noise Control of the Saab 340 Aircraft

891080

View Details

STANDARD

House Noise-Reduction Measurements for Use in Studies of Aircraft Flyover Noise

AIR1081

View Details

JOURNAL ARTICLE

Numerical and Experimental Study of Sound Power Reduction Performance of Acoustic Black Holes in Rectangular Plates

2015-01-2270

View Details

X