problems-by-deviation-of-wall-thicknessDeviations of wall thickness in sheet metal parts affectthe vibration behavior and also operating safety. Exhaust gas pipe with typicaldynamic fatigue damageca. 1 cmLabyrinth cone with typicaldynamic fatigue damage Wall thickness sIncitement force FStressSmall changes in the wall thickness "s" affect thedynamic part loads in several ways:Deflection/stress in the metal sheet under the same excitement force "F"Resonant frequencies and therefore also resonance A flexural specimen is fastened at oneend as a load model for flexural vibrations