| Summary: | In this study, acceleration
signals measured from the SAE J577 mechanical shock machine are investigated in
detail. The aim of this investigation is to derive representative standard
acceleration signals to be used as acceleration loads for finite element
fatigue analysis of Automotive Lighting parts. These signals can also be used
as load inputs for vibration shakers which have the capability of driving time
domain signals. First of all, acceleration signals have been measured from the
free machine table and by the help of the signal analysis software, automatic
averaging operation has been performed from the long train of shock signals to
have a single average acceleration shock signal. Furthermore; because the
machine is force controlled, it is understood that the total weight and the
overall dimensions of the device under test (DUT) and the fixture have
significant effect on the severity of the test. Thus, measurements are repeated
from the different sized fixtures and the results are compared in order to
understand the effects of the fixture size and the weight on test severity.
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