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BUCLAP2: A computer program for instability analysis of laminated long plates subjected to combined inplane loads. User's manual (1973)

Tamekuni, M. ; Halstead, D. W. ; Baker, L. L. ; [weitere]

In: CASI

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Publikationsdatum: 2019-06-27

Beschreibung: The usage of the computer program BUCLAP2 is described. The program is intended for linear instability analysis of long, rectangular flat and curved laminated plates with arbitrary orientation of orthotropic axes in each layer. The loadings considered are combinations of inplane normal and shear loads. Arbitray elastic boundary conditions are included for the sides of the plate Instructions for use of the program are included along with Input data requirements, output information, and sample problems. For program description, see .

Schlagwort(e): STRUCTURAL MECHANICS

Materialart: NASA-CR-132298 , D6-60187

Format: application/pdf

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BUCLAP2: A computer program for instability analysis of laminated long plates subjected to combined inplane loads (1973)

Tripp, L. L. ; Baker, L. L. ; Halstead, D. W. ; [weitere]

In: CASI

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Publikationsdatum: 2019-06-27

Beschreibung: This program description document describes the program structure and the design details of a CDC 6600 FORTRAN 4 digital computer program, BUCLAP2, which uses minimum energy principles to do an elastic stability analysis of curved and flat laminated rectangular long plates subjected to combined inplane normal and shear loads. Given the geometry, the material properties, and slected boundary conditions for the plate element, the program calculates the minimum buckling load for various wave lengths. The two parallel ends of the program calculates the minimum buckling load for various wave lengths. The two parallel ends of the long plate must be simply supported and arbitrary elastic boundary conditions may be imposed along either one or both external longitudinal sides. For guide to program use, see

Schlagwort(e): STRUCTURAL MECHANICS

Materialart: NASA-CR-132299

Format: application/pdf

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A preliminary analysis of a radar-mapping mission to Venus (1973)

Manning, L. A. ; Evans, L. C. ; Mackay, J. S. ; [weitere]

In: CASI

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Publikationsdatum: 2019-06-27

Beschreibung: A rather broad survey is reported of the Venus radar orbiter possibilities within the period 1983-1990. Minimum mission imaging requirements have been set by comparison with the improving capabilities of earth based radar systems and an examination of earth airborne radar imaging. This has led to a requirement for 80 percent coverage at a resolution of 100 m. A first main conclusion is that only the Shuttle-Centaur launch system would be capable of establishing a circular orbit under all possible launch conditions. Thus, orbit eccentricity has been introduced as a parameter throughout this presentation. An examination of typical radar designs has led to upper and lower limits on swath width of 100 and 50 km. A lower eccentricity of 0.2 was set by considering the current Viking propulsion system. An examination of solar perturbations indicates that orbit maintenance problems increase rapidly above an eccentricity of 0.5.

Schlagwort(e): SPACE SCIENCES

Materialart: NASA-TM-X-2868 , A-4834

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Infrared spectrum of the Orion Nebula between 55 and 200 microns. (1973)

Mord, A. J. ; Augason, G. C. ; Caroff, L. J. ; [weitere]

In: Other Sources

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Publikationsdatum: 2011-08-16

Schlagwort(e): SPACE SCIENCES

Materialart: Astrophysical Journal; 183; July 15

Format: text

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5

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Venus - Mass, gravity field, atmosphere, and ionosphere as measured by the Mariner 10 dual-frequency radio system (1974)

Fjeldbo, G. ; Brunn, D. L. ; Howard, H. T. ; [weitere]

In: Other Sources

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Publikationsdatum: 2019-06-27

Beschreibung: The unique properties of the Mariner 10 radio system, and the preliminary scientific results obtained from the analysis of the radio signals are described. In the normal two-way communication mode, a command- and range-modulated 2115-MHz signal is transmitted to the spacecraft for reception on its omnidirectional antenna. As implemented for Mariner 10, the dual-frequency system has proven fully capable of performing interplanetary columnar electron content measurements while achieving the prime goals of the celestial mechanics and radio science team. The determination of the mass and gravitational potential of Venus is one of the major objectives of the radio science experiments. Information on Venus's atmosphere was deduced from analysis of the radio signals during occultation. Open-loop receiver differential Doppler data were used to measure the nightside and dayside ionospheres of Venus.

Schlagwort(e): SPACE SCIENCES

Materialart: Science; 183; Mar. 29

Format: text

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6

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Design manual: Oxygen Thermal Test Article (OTTA) (1974)

Conder, R. L. ; Baese, C. L. ; Chronic, W. L.

In: CASI

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Publikationsdatum: 2019-06-27

Beschreibung: The characteristics of a cryogenic tank for storing liquid hydrogen, nitrogen, oxygen, methane, or helium for an extended period of time with minimum losses are discussed. A description of the tank and control module, assembly drawings and details of major subassemblies, specific requirements controlling development of the system, thermal concept considerations, thermal analysis methods, and a record of test results are provided. The oxygen thermal test article thermal protection system has proven that the insulation system for cryogenic vessels is effective.

Schlagwort(e): STRUCTURAL MECHANICS

Materialart: NASA-CR-140209 , ER15961

Format: application/pdf

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A users manual for a computer program which calculates time optical geocentric transfers using solar or nuclear electric and high thrust propulsion (1974)

Malchow, H. L. ; Edelbaum, T. N. ; Sackett, L. L.

In: CASI

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Publikationsdatum: 2019-06-27

Beschreibung: This manual is a guide for using a computer program which calculates time optimal trajectories for high-and low-thrust geocentric transfers. Either SEP or NEP may be assumed and a one or two impulse, fixed total delta V, initial high thrust phase may be included. Also a single impulse of specified delta V may be included after the low thrust state. The low thrust phase utilizes equinoctial orbital elements to avoid the classical singularities and Kryloff-Boguliuboff averaging to help insure more rapid computation time. The program is written in FORTRAN 4 in double precision for use on an IBM 360 computer. The manual includes a description of the problem treated, input/output information, examples of runs, and source code listings.

Schlagwort(e): SPACE SCIENCES

Materialart: NASA-CR-139038 , R-827

Format: application/pdf

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8

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An economical method of analyzing transient motion of gas-lubricated rotor-bearing systems. (1973)

Falkenhagen, G. L. ; Ayers, A. L. ; Barsalou, L. C.

In: Other Sources

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Publikationsdatum: 2019-07-13

Beschreibung: A method of economically evaluating the hydrodynamic forces generated in a gas-lubricated tilting-pad bearing is presented. The numerical method consists of solving the case of the infinite width bearing and then converting this solution to the case of the finite bearing by accounting for end leakage. The approximate method is compared to the finite-difference solution of Reynolds equation and yields acceptable accuracy while running about one-hundred times faster. A mathematical model of a gas-lubricated tilting-pad vertical rotor systems is developed. The model is capable of analyzing a two-bearing-rotor system in which the rotor center of mass is not at midspan by accounting for gyroscopic moments. The numerical results from the model are compared to actual test data as well as analytical results of other investigators.

Schlagwort(e): MACHINE ELEMENTS AND PROCESSES

Materialart: ASLE PREPRINT 73AM-2B-2 , Annual Meeting; Apr 30, 1973 - May 03, 1973; Chicago, IL

Format: text

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9

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Mission Planning for Pioneer Saturn/Uranus Atmospheric Probe Missions (1973)

Swenson, B. L. ; Manning, L. A. ; Tindle, E. L.

In: CASI

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Publikationsdatum: 2019-06-27

Beschreibung: Mission planning for a series of atmospheric probe missions to Saturn and Uranus using a modified Pioneer spacecraft launched in 1979 and 1980 was examined. The operational options and the associated systems requirements consistent with the major scientific goals and spacecraft constraints of the missions is summarized. It is feasible to obtain in-situ atmospheric measurements in the atmosphere of Saturn and Uranus down to a pressure level of 10 bars using a common probe and spacecraft design. Spacecraft can be launched to both objectives with an adequate launch window in 1979 and 1980 using a Titan/Centaur launch vehicle with a TE-364-4 upper stage. Other scientific objectives can be accomplished by the flyby spacecraft. Encounters with the satellite Titan and RF occultations of Saturn, the ring system of Saturn, and Uranus can be obtained.

Schlagwort(e): SPACE SCIENCES

Materialart: NASA-TM-X-2824 , A-4934

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10

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Low resolution spectrum of the Orion nebula in the 60-300 micron range (1973)

Giver, L. P. ; Kunz, L. W. ; Mord, A. J. ; [weitere]

In: Other Sources

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Publikationsdatum: 2019-07-13

Schlagwort(e): SPACE SCIENCES

Materialart: Symposium on Interstellar dust and related topics; May 29, 1972 - Jun 02, 1972; Albany, NY

Format: text

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