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de Jonge, H.W.G. (author)One of the most urgent problems of ATM is to reduce delays and to improve the punctuality of air traffic arriving at congested hub-airports. Layered planning with refinement and convergence in time and space, as proposed by EATMP [European ATM Programme], could give the required support for better use of these scarce resources. Refined Flow...report 2002
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Vink, W.J. (author), de Jonge, J.B. (author)The present report is part of a "Manual" on aircraft loads, that is being prepared by NLR. It contains a computer program, to be used in combination with "MATLAB4 for Windows" (Student Edition) software, to study aircraft loading due to turbulence. It includes a simple aircraft response model with two rigid and three flexible symmetric degrees...report 1997
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de Jonge, J.B. (author)A brief review is given of work performed in the Netherlands in the field of aeronautical fatigue. Where possible, applicable references have been presented. This review will be presented at the 25th ICAF Conference, Edinburgh, United Kingdom, 16-17 June 1997.report 1997
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de Jonge, J.B. (author), Hol, P.A. (author)Fatigue meter data obtained during operational flights of Fokker F27 and Fokker F28 aircraft were re-processed and analyzed to study the variation in load experience between different aircraft of the same type. The Data covered about 470000 flights, made by 101 aircraft of 51 different operators. A simple algorithm was developed to quantify the...report 1996
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de Jonge, J.B. (author)The present review gives a brief summary of the work performed in the Netherlands in the field of aeronautical fatigue, during the period from March 1993 until March 1995. The contributions come from three different sources, namely: The National Aerospace Laboratory (NLR) • The Department of Aerospace Engineering, Delft University of Technology ...report 1995
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- de Jonge, J.B. (author), Hol, P.A. (author), van Gelder, P.A. (author) report 1995
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de Jonge, J.B. (author), Vink, W.J. (author)Standard methods for the calculation of Design Continuous Gust Loads cannot be applied in the case of aircraft with nonlinear response characteristics. In such cases, Design Loads can be calculated using stochastic simulation techniques. These techniques, however, require a very large computational effort. Hence, alternative methods, indicated...report 1994
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de Jonge, J.B. (author)Modern aircraft structures are designed to be damage tolerant and to have an adequate durability. The Damage Tolerance provides structural safety in case of inadvertent cracking, the Durability determines the time that the structure can be kept in service in an economically acceptable way. Many aircraft are planned today to be kept in service...report 1994
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de Jonge, J.B. (author)A brief review is given of work performed in the Netherlands in the field of aeronautical fatigue. Where possible, applicable references have been presented.report 1993
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Ottens, H.H. (author), de Jonge, J.B. (author)The present paper gives a brief review of current and planned research at NLR related to the problems associated with Ageing Aircraft. This research is primarily directed towards the prevention of Ageing Aircraft problems in future aircraft and is concentrated on two areas: - prevention of MSD in lap joints; - improved knowledge on operational...report 1992
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de Jonge, J.B. (author)Many military aircraft are used more severely and over a longer periodthan originally intended. Consequently, a careful life management, including service load monitoring has become indispensable. This paper describes the development of a simple method to quantify the severity in terms of "potential crack growth" of recorded load spectra. This...report 1992
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de Jonge, J.B. (author), Bartelds, G. (author)The problems of Ageing Aircraft are worldwide. Hence, actions to overcome or prevent these problems should be taken in international collaboration. The Federal Aviation Administration FAA and the Netherlands Civil Aviation Department RLD have signed a Memorandum of Cooperation in the area of structural integrity, with specific reference to...report 1991
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de Jonge, J.B. (author)Paper presented at the 17th ICAS Congress, Stockholm, September 1990. The actual service load experience of aircraft may differ appreciably from design assumptions. The necessity to monitor service loads is generally recognized now for military aircraft. This paper starts with a general review of the overall life management procedure commonly...report 1990
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de Jonge, J.B. (author)Using a relatively simple model, calculations are made of the effect of various load spectrum variations on fatigue damage accumulation for fighter aircraft, with specific reference to RNLAF F-16 A/B aircraft. As the larger part of the total damage is due to manoeuvres with peak value between An = 3.5 and An = 6, reduction of manoeuvring in this...report 1989
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de Jonge, J.B. (author)A statistical analysis was made of flight load data pertaining to about 10000 RNLAF F-104G operational flights. The distributions of load experience per flight could be fairly well approximated by Weibull-distribution functions. Specific attention is paid to the differences in load experience per aircraft. The paper concludes with a discussion...report 1989
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de Jonge, J.B. (author)The paper starts with a review of the various types of loading acting on the aircraft structure and our ability to accurately predict their magnitude and frequency of occurrence for a given aircraft usage. Next, attention is paid to the variation in load experience and its causes, with specific reference to the variation in aircraft usage. For...report 1989
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de Jonge, J.B. (author)A brief review is given of work performed in the Netherlands in the field of aeronautical fatigue. Where possible, applicable references have been presented.report 1987
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de Jonge, J.B. (author), Noback, R. (author), van der Wekken, J.J.P. (author)Since more than ten years, service load data, including e.g. acceleration peaks, recorded in B747 aircraft have been stored at NLR in the so-called AIDS-Fatigue Data Base. This paper describes the procedures applied to reduce the acceleration date to "delivered gust velocities". The results are presented and compared with other data sources. The...report 1986
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de Jonge, J.B. (author)This report reviews the applicability of damage tolerance concepts to helicopter structures. After a general discussion of the damage tolerance concept, attention is paid to the specific aspects of the helicopter loading environment. Examples are presented of damage tolerant design, both in metal and in composite structures. However, it is felt...report 1986
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de Jonge, J.B. (author), van Lummel, C.W.J. (author)An analysis has been made of acceleration recordings made during 9500 flights of Lockheed (R)F-104G fighter aircraft. The load experience per flight is a stochastic whose distribution turns out to be fairly well approximated by a Weibull distribution. The observed variation in load experience between aircraft flying the same duty is studied in...report 1985