Conference Paper

Influence of Operating Load Spectra Shapes on Reliability Demonstration Test Planning

June 2022

Conference: 16th Probabilistic Safety Assessment & Management Conference (PSAM 16)
At: Honolulu, Hawaii, USA

Authors:

University of Stuttgart

University of Stuttgart

Planning reliability demonstration tests is particularly complex if end-of-life tests are used instead of standard success run tests. In addition to the factors of cost and time, the probability of test success can be used to select the optimal test strategy. This has already been considered for a single-stage load in several papers. In real applications single stage loads are not applied. Using single stage loads also leads to ignoring the changing confidence level of the life model due to the placement of the test load levels. Recent research now also uses operating load spectra, deriving the probability of test success for the accumulated damage of the load spectrum. Considering the influence of this operating load spectrum on the probability of test success is therefore a logical step. To determine if there is an influence and how different parameters change the influence a simulation study with a wide parameter space is executed and analyzed. The study shows an influence where different parameters can affect the achievable probability of test success. This happens due to the interaction of the operating loads of the spectrum with the confidence level of the life model influenced by the test levels and test specimen.

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