Spacecraft structures are subjected to severe environmental mechanical loads especially during the launch phase. By means of flight load analysis using a dynamic mathematical model spacecraft have to be qualified to withstand all load events occurring during this phase. To verify the mathematical model of the spacecraft, system identification by means of experimental mechanical testing is a prerequisite. One of the most powerful methods for experimental system identification is the modal survey test based on the phase resonance method. The features of the modal survey test facility, with special emphasis on applications experiences, and improvements in the testing of current spacecraft structures are described. A second important field of mechanical testing is qualification testing by realistic simulation of the flight loads. In general, this is still being done by uniaxial shaker tests. Current trends in the development of multi axis vibration simulation systems are reviewed.
Experiences with and Prospects for Dynamic Mechanical Testing of Spacecraft Structures
1990
7 pages
Report
No indication
English
Space Launch Vehicles & Support Equipment , Structural Mechanics , Laboratory & Test Facility Design & Operation , Dynamic structural analysis , Load tests , Loads (Forces) , Modal response , Motion simulation , Space vehicle checkout program , Spacecraft structures , Test facilities , Axial stress , Mathematical models , Proving , Resonant vibration , Transient response , Foreign technology
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