PSI - Issue 38

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Ronald Schrank / Structural Integrity Procedia 00 (2021) 000 – 000

Ronald Schrank et al. / Procedia Structural Integrity 38 (2022) 30–39

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6. Summary, conclusion The capability and performance of a new numerical optimization method for fatigue test simplification is shown, using an example of a control arm of a double-wishbone wheel suspension. 11 design variables describe the simplified test set-up (3-channel fatigue test with constant amplitudes, enriched by mean values, phase angles and parameters for load-direction). They have been identified by an efficient combination of fatigue damage calculations and hybrid intelligent optimization within a short run-time. Validation shows very good matching of fatigue damages resulting from reference (full test) and simplified test. This matching quality isn’t feasible by any other conventional optimization strategies driven by manual approaches. The application to other automotive chassis parts (knuckles, subframes) will continue and provide more experiences, especially for choosing typical optimization parameters (e. g. population size, parameters for typical evolutional processes like mutation, …). Other enhancements are planned, mainly the future support of welded structures. References

Kramer, O.: Computational Intelligence, Eine Einführung. Springer, 2009. Radaj, D., Vormwald, M.: Ermüdungsfestigkeit, Grundlagen für Ingenieure. 3. Auflage, Springer, 2015. Weicker, K.: Evolutionäre Algorithmen. 3. Auflage, Springer, 2015.