Hi to all,
I am doing a optimization. In my optimization I meause frequency response displacement (real,rss of them) of 9 points as responses. After that, I sum them. My objective is minimizing summation of the displacements. I also have a constraint such that I dont want any resonance frequency between 2200Hz<>3200Hz. My optimization model frequency runs btwn 1500Hz and 5000Hz. once optimization is done I manually sum the 9 points displacements to compare it with optimization results. However, I see that results are different. When I sum displacement between 2200-3200 Hz the difference is 5% whereas when I sum them for a range of 1500-5000Hz the difference is 25%. My question is where does this difference come from? What is the optimization logic of optistucurt which range of frequency is summed by it for minimizing the sum displacements 2200-3200 Hz or 1500-5000Hz?
Thanks for your time.