Ground vibration test of an F-16 airplane with modified decoupler pylons

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National Aeronautics and Space Administration, Scientific and Technical Information Branch, For sale by the National Technical Information Service , Washington, D.C, Springfield, Va
Vibration (Aeronautics), F-16 (Jet fighter plane) -- Te
StatementF.W. Cazier, Jr., M.W. Kehoe.
SeriesNASA technical memorandum -- 87634.
ContributionsKehoe, M. W., Langley Research Center.
The Physical Object
Pagination1 v.
ID Numbers
Open LibraryOL17634634M

Get this from a library. Ground vibration test of an F airplane with modified decoupler pylons. [F W Cazier; M W Kehoe; Langley Research Center.]. The decoupler pylon is a passive wing/store flutter suppression device. It was modified to reduce friction following initial flight tests.

A ground vibration test was conducted on an F aircraft loaded on each wing with a one-half-full (center bay empty) gallon fuel tank mounted on a standard pylon, a GBU-8 store mounted on the decoupler pylon, and an AIM Author: Jr.

Cazier and M. Kehoe. Ground vibration test of an F airplane with modified decoupler pylons / By F. Cazier, M. Kehoe and Langley Research Center. Topics: F (Jet fighter plane), Vibration. Ground Vibration Test Planning of a Fighter Aircraft by Using a Rough Finite Element Model aircraft.

FEM of F aircraft is modified The objective of this study is to simulate GVT. Strain Modal Analysis Applied on the Ground Vibration Testing of an F On this second experimental example, the use of dynamic piezo strain sensors on the ground vibration testing (GVT) of an.


Description Ground vibration test of an F-16 airplane with modified decoupler pylons PDF

dos Santos´ 1,2,3,∗, Bart Peeters1, Jan Debille1, Carmine Salzano4, Luiz Carlos S. Goes´ 2 and Wim Desmet 3 1Siemens Industry Software NV Interleuvenl Leuven, Belgium. Issue 12 - ecember - Aircraft Ground Vibration Testing at ONERA AL Testing in Aerospace Research Aircraft Ground Vibration Testing at ONERA S.

Giclais, P. Lubrina, C. Stephan (ONERA) E-mail: [email protected] DOI: /AL During the development of a new aircraft, the Ground Vibration Test (GVT) is anFile Size: 3MB. ysis methods, and test procedures used for typical test programs are discussed. The data presented illustrate the use of modal test and analysis in flight research programs for a variety of aircraft.

This includes a tech-nique to acquire control surface free-play measurements on the X airplane more efficiently, and to. Ground Vibration Testing is an economic method for determining the modal parameters and mode shapes of a structure in preparation for further aeroelastic analysis. 3MAAP, Inc.

has been commissioned by Dr.

Details Ground vibration test of an F-16 airplane with modified decoupler pylons PDF

Ron O. Stearman of the University of Texas at Austin to conduct a GVT (Ground Vibration Test) on a Star-Lite aircraft in preparation for anFile Size: 6KB.

present investigated plane). The manufacturer has to ensure a save operation in the capable range of speed for the airplane, what necessitates the verification of flutter stabilitydue to aeroelastic excitation.

This is done by calculation based on a ground vibration test to detect the modal parameters. 2 Phase Resonance Method. The decoupler pylon is a passive wing/store flutter suppression device.

It was modified to reduce friction following initial flight tests. A ground vibration.

Download Ground vibration test of an F-16 airplane with modified decoupler pylons FB2

Modern solutions for Ground Vibration Testing of large aircraft Bart Peeters(1), Héctor Climent(2) purpose of the test is to obtain experimental vibration data of the whole aircraft structure for validating and opening the work envelope of the tanker or performing dry/wet contacts with an F experiments during the aircraft development is the ground vibration test (GVT).

It measures the modal characteristics of the aircraft, which are the main input data for the flutter analyses. With regard to GVT, there are two approaches, how to incorporate results into the flutter analysis: 1) direct usage of GVT resultsFile Size: KB. namic data documented during the design of the FXL did not contain any ground or flight tests of the modified aircraft configuration.

So ground vibration and flight tests were required before and after the modification. One ground vibration test (GVT) was performed before the modification for baseline data;File Size: 2MB.

The simulation incorporates the previously published results of ground tests performed on the flight Decoupler Pylons mounted in a test fixture at General Dynamic's Fort Worth facility.

The analyses show that the Decoupler Pylon will suppress wing-store flutter for the GBU-8 flight test stores configuration on an F airplane. Ground Vibration Testing Solution for Aircraft Manufacturer Submitted by VTI Instruments With more than million commercial flights per year, aviation manufacturers are always pushing to increase the safety, efficiency, and comfort of their aircraft.

To achieve the desired. Ground vibration testing of a Predator® B Unmanned Aircraft System (UAS) developed by General Atomics Aeronautical Systems, Inc. (GA-ASI) was performed to validate analytic models and assess local and global structural dynamics. The aircraft was fitted with a unique sensor package: an up-looking turret chin-mounted on the forward : Daniel Linehan, Joshua Davis, Jason Korniski.

Just the decoupler by itself in the first stage and make sure you move engines and anything else out of the first stage and into the second or higher. Then hit the space bar. The decouplers should go flying off to the sides (I always use symmetry, so there are 2 when I do it) and explode.

Test completed. DYNAMIC ANALYSIS. The test data obtained from a complete airplane ground vibration test of the F with the decoupler pylon was used as one set of data to improve the airplane simulation.

The complete airplane ground vibration test results are presented in reference 8. The ground vibration test (GVT) system is necessary to assure the aeroelastic and aeroservoelastic stability of new and modified aircraft. These GVT data are used to validate analytical vibration and flight control models by measuring flight control transfer functions and structural frequency response functions.

performed on a transport airplane, during October The objective was to demonstrate, develop, or explore several concepts that offer promise of breakthrough efficien-cies in the modal testing of airplanes, or ground vibration test-ing.

Participants from an aircraft manufacturer, a university. Cazier Jr FW, Kehoe MW. Flight test of a decoupler pylon for wing/store flutter suppression.

AIAA flight testing conference, AIAA paper ; Google Scholar [31]. Cazier Jr FW, Kehoe MW. Ground vibration test on an F airplane with modified decoupler pylons. Technical memorandum NASA-TM, NASA; Google ScholarCited by: The test is performed by making the known-value current flow through the earth diffusion resistance and an auxiliary electrode, called the current electrode, and by measuring the voltage produced between grounding and another auxiliary electrode, thrust into the ground in the area of the potential created by flowing current (Potential Plateau).

As the A is a derivative of the A (which underwent a ground vibration test programme for its own type certification, issued last November), a multifunctional Airbus Commercial Aircraft team was set up to shorten and simplify the process.

For Airplanes, It's One Test After Another. For Airplanes, It's One Test After Another. Phone: () Client Login. Vibration Testing. even if it’s an airplane. Airplanes have to undergo rigorous vibration stress testing to make certain they won’t fall apart in. 8 SOUND & VIBRATION/JANUARY Ground vibration testing (GVT) of aircraft is typically per-formed very late in the development process.

The main purpose of the test is to obtain experimental vibration data of the whole aircraft structure for validating and improving its structural dynamic models.

Ground Effect. When a helicopter hovers close to the ground, the rotor directs air downward faster than it can escape. This builds up a cushion of dense air beneath the helicopter known as ground cushion or ground effect.

It is effective to a height of one half the rotor diameter. Ground cushion effect does not occur at airspeeds greater than.

AGDC2 - Eliminates AC Hum on Sound System Ground loops cause AC Hum. When electronic equipment is connected to a mixer, sometimes a ground loop is created.

A ground loop is a voltage difference between the mixer AC ground connection and the AC ground connection of other equipment connected to the mixer. The General Dynamics F Fighting Falcon is a single-engine supersonic multirole fighter aircraft originally developed by General Dynamics for the United States Air Force (USAF).

Designed as an air superiority day fighter, it evolved into a successful all-weather multirole aircraft. Over 4, aircraft have been built since production was approved in Manufacturer: General Dynamics, Lockheed Martin. One of the first steps in the design qualification was to assess the vibration conditions the mapping system would experience when mounted to the aircraft.

Five Rings contacted Lansmont about using our SAVER 9X30 to record the dynamic conditions of the J32 aircraft during flight operations in order to provide actual vibration data to the.

The role of the Director, Operational Test and Evaluation at the Pentagon is to ensure that US weapons programs continue on track and that the weapons do what they are supposed to. His report for the year can be found here. The interesting observations in the report, with respect to the F, are listed.Add to Book Bag Remove from Book Bag Saved in: Flutter clearance of the F high-angle-of-attack research vehicle with experimental wingtip instrumentation pods.

The modified aircraft were designated "MiGMLD", where "D" stood for "dorabotannyi / upgraded". The changes included: Small strakes or "vortex generators" attached to the side of the nose pitot tube and a distinctive notch at the leading-edge root of each wing glove, both innovations intended to create vortexes over the flight control.