A Formulation of Rotor-airframe Coupling for Design Analysis of Vibrations of Helicopter Airframes PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download A Formulation of Rotor-airframe Coupling for Design Analysis of Vibrations of Helicopter Airframes PDF full book. Access full book title A Formulation of Rotor-airframe Coupling for Design Analysis of Vibrations of Helicopter Airframes by . Download full books in PDF and EPUB format.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 140
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 140
Get Book Here
Book Description
Author: Robert Sopher
Publisher:
ISBN:
Category : Airframes
Languages : en
Pages : 214
Get Book Here
Book Description
This report describes a Coupled Rotor/Airframe Vibration Analysis which was developed as a design tool for predicting helicopter vibrations, and a research tool to quantify the effects of structural properties, aerodynamic interactions and vibration reduction devices on vehicle vibration levels. The analysis consists of a Base Program utilizing an impedance matching technique to represent the coupled rotor/airframe dynamics of the system supported by inputs from several External Programs supplying sophisticated rotor and airframe aerodynamic and structural dynamic representation. The Base Program has a stand-alone capability to provide assessment of the effects of changes in airframe dynamics and vibration reduction devices on vehicle vibration levels. The Base Program is too restricted in input support from any particular programs and can be executed interactively from any particular programs and can be executed interactively for many pertinent applications.
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781723548345
Category :
Languages : en
Pages : 228
Get Book Here
Book Description
The formulation and features of the Rotor-Airframe Comprehensive Analysis Program (RACAP) is described. The analysis employs a frequency domain, transfer matrix approach for the blade structural model, a time domain wake or momentum theory aerodynamic model, and impedance matching for rotor-fuselage coupling. The analysis is applied to the AH-1G helicopter, and a correlation study is conducted on fuselage vibration predictions. The purpose of the study is to evaluate the state-of-the-art in helicopter fuselage vibration prediction technology. The fuselage vibration predicted using RACAP are fairly good in the vertical direction and somewhat deficient in the lateral/longitudinal directions. Some of these deficiencies are traced to the fuselage finite element model. Sangha, K. and Shamie, J. Unspecified Center NASA-CR-181974, NAS 1.26:181974 NAS1-17498; RTOP 505-63-51-01...
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 702
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 26
Get Book Here
Book Description
Author: Shmuel Fledel
Publisher:
ISBN:
Category : Helicopters
Languages : en
Pages : 304
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 40
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 410
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 980
Get Book Here
Book Description
Two-volume collection of case studies on aspects of NACA-NASA research by noted engineers, airmen, historians, museum curators, journalists, and independent scholars. Explores various aspects of how NACA-NASA research took aeronautics from the subsonic to the hypersonic era.-publisher description.
Author: Michael J. Rutkowski
Publisher:
ISBN:
Category : Helicopters
Languages : en
Pages : 84
Get Book Here
Book Description
