Comparison of Modal Test Results: Multipoint Sine Versus Single-Point Random 760879

Several software packages have been developed for use with minicomputers to decrease the test schedule and cost of modal surveys. The newer development referred to as “single-point random,” appears to have potential cost and schedule advantages, but evaluations of the adequacy of test results and test experience on complex structures are almost nonexistent.The tests, performed on the Mariner Jupiter/Saturn (MJS) spacecraft, provide an additional comparison of the more traditional multipoint sine dwell and the single-point random modal test methods.


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