Hello Everybody,
I have to perform ultrasonic machine sonotrode frequency analysis to uderstand which modal frequency is of our interest and its value. My doubt is related to the boundry conditions. Is it better to perform the analysis considering free free B.C or by implying the real constraints?
Only linear contacts are valid in frequency analysis; hence, nonlinear contacts (no-penetration in SWX) is not valid. You only have two choices of either bonded or allow penetration. Having said that you must have a thorough understanding of your model and have some experimental data to validate your simulation/analysis approach.