The synthesis and decomposition of forces do not apply to dynamics in COMSOL?
Posted Aug 24, 2019, 11:22 PM EDT Mechanical, Acoustics & Vibrations Version 5.3a 2 Replies
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I have built three 2D plane strain models in COMSOL, each model was applied dynamic concentrated forces (1 MHz, last 10 microsecond), which are equivalent, at point A as shown in the figure named 'resultant decomposed force', and the results were the displacement of Rayleigh wave in the far field (at point B) on the free surface.
Except for the forces are different, everything else for the three models are the same, the results should be the same since the forces are equivalent. However, the results are not the same, results of force 2 and 3 are the same, results of force 1 is different.
The results for force 1, 2, 3 can be found in the attached pictures. I have no idea why the results are not the same. Does the synthesis and decomposition of forces not apply to dynamics?
Would you please help me? Thank you a lot.