Dynamic characterization of a lightweight, highly maneuverable spacecraft using modal and finite element analyses

Conference · Sun Nov 01 04:00:00 EST 1992

OSTI ID:10178109

Manning, P A; Burdick, R B; Woehrle, T G

The Lawrence Livermore National Laboratory is engaged in a technology development project which includes designing a lightweight, autonomous, highly maneuverable space vehicle, commonly referred to as a probe. The current probe design includes a guidance and control system that requires complete information on the dynamic response of the probe during operation. A finite element model of the probe was constructed to provide analytical information on the dynamic response to specific operational inputs. In order to verify the assumptions made in the model, a mass mock-up of the probe was constructed at LLNL and an experimental modal survey was performed to determine the frequencies, damping values and deflection shapes for each natural mode of the mock-up. The experimental modal parameters were compared with the parameters obtained through modal analysis of the finite element model to provide a measure of the correlation between the model and the actual structure. This report describes the experimental modal testing and analysis of the mass mock-up and compares the experimental results with the finite element results.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 10178109
• Report Number(s): UCRL-JC--110987; CONF-930241--2; ON: DE93018095
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420200
99 GENERAL AND MISCELLANEOUS
990200
COMPUTER-AIDED DESIGN
FACILITIES, EQUIPMENT, AND TECHNIQUES
FINITE ELEMENT METHOD
MATHEMATICS AND COMPUTERS
MOCKUP
SPACE VEHICLES
TESTING
WEIGHT