Experimental modal survey of the probe mass mock-up

Technical Report · Wed Jul 01 00:00:00 EDT 1992

OSTI ID:6724006

Manning, P A; 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; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6724006
• Report Number(s): UCRL-ID-112191; ON: DE93008846
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
SPACE VEHICLES
MOCKUP
TESTING
ACCELEROMETERS
AUTOMATION
CONTROL SYSTEMS
FINITE ELEMENT METHOD
OSCILLATIONS
PROBES
REMOTE CONTROL
CALCULATION METHODS
CONTROL
MEASURING INSTRUMENTS
NUMERICAL SOLUTION
STRUCTURAL MODELS
VEHICLES
420200* - Engineering- Facilities
Equipment
& Techniques