Recent content by ataras

Thanks, location of excitations points is crucial. Every time you change them you do get different results. Point I was trying to make is that you induce vibration through excitation points on particular modes without having to constrain the object.

Using MSC Nastran 103 to calculate BIW (car's sheet metal platform only)resonance frequency by FE method, do we need to apply any constrains? I think, a free modal analysis means no constrains, however, final outcome (Hz)will depends on where forces are applied to the model ? Cross car...