Techniques are discussed for deriving constrained vibration mode shapes for space shuttle payloads using unconstrained or free-boundary dynamic properties. Application of the residual flexibility method requires measurement of a set of free boundary modes plus the residual flexibility of the payload-to-orbiter interfaces. The mass-additive approach involves the measurement of unconstrained modes and frequencies of a payload with large masses attached to the interfaces. In either case, the orbiter interfaces of the test-verified payload model are analytically constrained to provide the mode shapes for the shuttle-constrained configuration. Use of these methods or a hybrid combination of them for structures to which they are applicable allows the difficulty and expense associated with development and verification of fixed-base test fixtures to be avoided.
Cost-effective test methods for Shuttle payloads
01.01.1993
Aufsatz (Konferenz)
Keine Angabe
Englisch
Cost-Effective Test Methods for Shuttle Payloads
NTIS | 1993
|NTRS | 1977
|Integration and Test for Small Shuttle Payloads
NTRS | 2001
|Integration and Test of Shuttle Small Payloads
NTRS | 2003
|