Ansys Learning Forum Forums Discuss Simulation General Mechanical Solution combination for Random vibration and Static Structural Reply To: Solution combination for Random vibration and Static Structural

AR
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Thank you for your response!

I’ve reviewed the information from Ansys and noticed that equivalent stress in random vibration analyses is calculated using the Segalman-Fulcher method not Von Mises method, meaning that combining results with Von Mises wouldn’t be correct either. So why does Ansys allow results to be combined between Random Vibration and Structural Static analysis if it doesn’t make sense to combine unsigned stresses (random vibration) with signed stresses (static)?

Therefore... How could I add the effects of the structural static with the random vibration? Would it be an acceptable approach to add the equivalent stress from the static structural with the equivalent stress from the random vibration (3-sigma)? I mean, in that case, I would add the Von Mises stress with stress values that cover 99.73% of the likelihood of the real stress falling within those limits. This seems like a conservative solution to me. Don’t you think?

Is there another way you could recommend to analyze the combined effect of both tests?

Best regards,