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Developing Force Limited Random Vibration Test Specifications For Nonlinear Systems Using The Frequency Shift Method
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Book Synopsis Developing Force-limited Random Vibration Test Specifications for Nonlinear Systems Using the Frequency-shift Method by : Gregory L. Davis
Download or read book Developing Force-limited Random Vibration Test Specifications for Nonlinear Systems Using the Frequency-shift Method written by Gregory L. Davis and published by . This book was released on 1999 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of a Force Specification for a Force-limited Random Vibration Test by :
Download or read book Development of a Force Specification for a Force-limited Random Vibration Test written by and published by . This book was released on 1996 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vibration testing, techniques have been developed and employed that reduce the overtesting caused by the essentially infinite mechanical impedance of the shaker in conventional vibration tests. With these ''force-limiting'' techniques, two vibration test specifications are used: the conventional acceleration specification, and an interface force specification. The vibration level of the shake table is controlled such that neither the table acceleration nor the force transmitted to the test item exceeds its specification, hence the name ''dual control'' vibration test. The effect of limiting the shake table vibration to the force specification is to reduce (''notch'') the shaker acceleration near some of the test item's resonance frequencies. Several methods of deriving the force specification have been described in the literature. A new method is proposed in this paper that is based on a modal method of coupling two dynamic systems, in this case the ''source'' or launch vehicle, and the ''load'' or payload. The only information that is required is an experimentally-measurable frequency-response function (FRF) called the dynamic mass for both the source and the load. The method, referred to as the coupled system, modal approach (CSMA) method, is summarized and compared to an existing method of determining the force specification for force-limited vibration testing.
Book Synopsis Force Limited Vibration Testing Monograph by : Terry D. Scharton
Download or read book Force Limited Vibration Testing Monograph written by Terry D. Scharton and published by . This book was released on 1997 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Validation of Force Limited Vibration Testing at NASA Langley Research Center by : Chad E. Rice
Download or read book Validation of Force Limited Vibration Testing at NASA Langley Research Center written by Chad E. Rice and published by . This book was released on 2003 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 2005 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nonlinear Random Vibration by : Cho W.S. To
Download or read book Nonlinear Random Vibration written by Cho W.S. To and published by CRC Press. This book was released on 2000-01-01 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a systematic presentation of several classes of analytical techniques in non-linear random vibration. The book also includes a concise treatment of Markovian and non-Markovian solutions of non-linear differential equations.
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781721573219 Total Pages :36 pages Book Rating :4.5/5 (732 download)
Book Synopsis Validation of Force Limited Vibration Testing at NASA Langley Research Center by : National Aeronautics and Space Administration (NASA)
Download or read book Validation of Force Limited Vibration Testing at NASA Langley Research Center written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-20 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vibration tests were performed to develop and validate the forced limited vibration testing capability at the NASA Langley Research Center. The force limited vibration test technique has been utilized at the Jet Propulsion Laboratory and other NASA centers to provide more realistic vibration test environments for aerospace flight hardware. In standard random vibration tests, the payload is mounted to a rigid fixture and the interface acceleration is controlled to a specified level based on a conservative estimate of the expected flight environment. In force limited vibration tests, both the acceleration and force are controlled at the mounting interface to compensate for differences between the flexible flight mounting and rigid test fixture. This minimizes the over test at the payload natural frequencies and results in more realistic forces being transmitted at the mounting interface. Force and acceleration response data was provided by NASA Goddard Space Flight Center for a test article that was flown in 1998 on a Black Brant sounding rocket. The measured flight interface acceleration data was used as the reference acceleration spectrum. Using this acceleration spectrum, three analytical methods were used to estimate the force limits. Standard random and force limited vibration tests were performed and the results are compared with the flight data. Rice, Chad and Buehrle, Ralph D. Langley Research Center NASA/TM-2003-212404, L-18280, NAS 1.15:212404
Book Synopsis The Development of Vibration Test Specifications for Spacecraft Applications by : G. H. Klein
Download or read book The Development of Vibration Test Specifications for Spacecraft Applications written by G. H. Klein and published by . This book was released on 1964 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document discusses the problem of developing vibration test specifications for flight vehicles from a broad engineering viewpoint. The specific steps related to the development of specifications are outlined, and the various procedures currently employed to accomplish each step are reviewed. The shortcomings of current procedures are then summarized with emphasis on the special problems posed by spacecraft applications. Finally, a logical implementation of state-of-the-art procedures to create efficient vibration test specifications for spacecraft is suggested and outlined. The problems associated with the suggested approach are discussed and areas in need of further study are noted.
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 1048 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Force Limited Vibration Testing Monograph by : T. D. Scharton
Download or read book Force Limited Vibration Testing Monograph written by T. D. Scharton and published by CreateSpace. This book was released on 2014-04-15 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: The work described in this paper was carried out by the Jet Propulsion Laboratory, California Institute of Technology under a contact with the National Aeronautics and Space Administration. The support of the NASA Headquarters Office of Chief Engineer for the development and documentation of the force limited vibration testing technology described in this monograph is gratefully acknowledged.
Book Synopsis Investigation of the Semi-empirical Method for Force Limited Vibration Testing by : Vijayamohan Rao Dharanipathi
Download or read book Investigation of the Semi-empirical Method for Force Limited Vibration Testing written by Vijayamohan Rao Dharanipathi and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aerospace America written by and published by . This book was released on 1999 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structural Dynamics and Probabilistic Analysis for Engineers by : Giora Maymon
Download or read book Structural Dynamics and Probabilistic Analysis for Engineers written by Giora Maymon and published by Elsevier. This book was released on 2008-07-01 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: Probabilistic structural dynamics offers unparalleled tools for analyzing uncertainties in structural design. Once avoided because it is mathematically rigorous, this technique has recently remerged with the aide of computer software. Written by an author/educator with 40 years of experience in structural design, this user friendly manual integrates theories, formulas and mathematical models to produce a guide that will allow professionals to quickly grasp concepts and start solving problems. In this book, the author uses simple examples that provide templates for creating of more robust case studies later in the book. *Problems are presented in an easy to understand form *Practical guide to software programs to solve design problems *Packed with examples and case studies of actual projects *Classical and the new stochastic factors of safety
Book Synopsis Random Vibration of Systems with Nonlinear Restoring Forces by : Stephen H. Crandall
Download or read book Random Vibration of Systems with Nonlinear Restoring Forces written by Stephen H. Crandall and published by . This book was released on 1961 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two procedures are discussed for studying the response of nonlinear systems to random excitation. The Fokker-Planck method is potentially applicable to a wide class of problems but the integrations required have only been effected in a few special cases. The equivalent linearization method is easy to carry out but is limited to small nonlinearities. It is demonstrated that to first order in the nonlinearity the equivalent linearization estimate of mean square stationary response is identical with that provided by the Fokker-Planck equation. A new equivalent linearization procedure for estimating the expected frequency of zero crossings in the random response is described and shown to give the same result as the Fokker-Planck equation. (Author).
Book Synopsis Random Vibration of a Nonlinear System with a Set-up Spring by : Stephen H. Crandall
Download or read book Random Vibration of a Nonlinear System with a Set-up Spring written by Stephen H. Crandall and published by . This book was released on 1961 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several aspects of the problem of random vibration in nonlinear systems are discussed in terms of a particular set-up spring system. Exact solutions for the mean square response and the expected frequency of zero crossings are obtained by means of the Fokker-Planck equation. These are compared with approximate solutions obtained from equivalent linearization techniques. The distribution of response peaks is then studied and a probability density is derived for the peaks on a relative frequency basis. The probability density of the response envelope is also obtained and the relationship between the two distributions is discussed.
Book Synopsis Vibration Testing by : Kenneth G. McConnell
Download or read book Vibration Testing written by Kenneth G. McConnell and published by John Wiley & Sons. This book was released on 1995-09 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt: Consequently, the user of this equipment can be the dominant influence on the quality of test results.
Book Synopsis Harmonic Balance for Nonlinear Vibration Problems by : Malte Krack
Download or read book Harmonic Balance for Nonlinear Vibration Problems written by Malte Krack and published by Springer. This book was released on 2019-03-23 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph presents an introduction to Harmonic Balance for nonlinear vibration problems, covering the theoretical basis, its application to mechanical systems, and its computational implementation. Harmonic Balance is an approximation method for the computation of periodic solutions of nonlinear ordinary and differential-algebraic equations. It outperforms numerical forward integration in terms of computational efficiency often by several orders of magnitude. The method is widely used in the analysis of nonlinear systems, including structures, fluids and electric circuits. The book includes solved exercises which illustrate the advantages of Harmonic Balance over alternative methods as well as its limitations. The target audience primarily comprises graduate and post-graduate students, but the book may also be beneficial for research experts and practitioners in industry.
