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- W144497468 abstract "The theory and application of a method which utilizes the free response of a structure to determine its vibration parameters is described. The time-domain free response is digitized and used in a digital computer program to determine the number of modes excited, the natural frequencies, the damping factors, and the modal vectors. The technique is applied to a complex generalized payload model previously tested using sine sweep method and analyzed by NASTRAN. Ten modes of the payload model are identified. In case free decay response is not readily available, an algorithm is developed to obtain the free responses of a structure from its random responses, due to some unknown or known random input or inputs, using the random decrement technique without changing time correlation between signals. The algorithm is tested using random responses from a generalized payload model and from the space shuttle model." @default.
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- W144497468 date "1977-10-01" @default.
- W144497468 modified "2023-09-27" @default.
- W144497468 title "Modal identification of structures from the responses and random decrement signatures" @default.
- W144497468 hasPublicationYear "1977" @default.
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