If you are using the time series load provider in Ansys nCode DesignLife, the solver multiplies one set of FE results by the scale factors stored in the time series file to create a stress history. For example, if the time series file contained 1,3,-1, the solver just creates a stress history that varies from 1*FE results to 3*FE results to -1*FE results.  The time series load provider creates a stress history that is independent of time.
If the actual loading time is critical, then you may not be able to use a time series load provider. For example, if the acceleration loading produces dynamic behavior as a function of time, you may need to run a time-transient analysis to accurately capture the dynamic stresses as a function of time and use a time step load provider with multiple FE result sets to capture the stress history.
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