Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
Eigenfrequency analysis in deformed configuration
Posted 8 apr 2021, 04:01 GMT-4 Structural & Acoustics, MEMS & Piezoelectric Devices Version 5.6 0 Replies
Please login with a confirmed email address before reporting spam
Hello, I am trying to do an eigenfrequncy analysis for my planar MEMs microstage design. The stage is connected to the actuator with 3 sets of intermediate parallel guided flexures.
At a displaced configuration (in x, y, or theta), the leaf springs are expected to bend and have a reduced stiffness and reduced eigenfrequencies than undisplaced configurations.To analyse this, I applied a prescribed displacement in the x-direction to the stage (keeping other degress free), and ran a pressed eigenfrequency study. However rather than reduction in eigenfrequency, I am getting an increment of the same. This maybe due to the additional displacement constraint which does not allow the system to vibrate freely in the deformed configuration. I'm relatively new in COMSOL and not sure how to model it differently.
Can anyone help me fix this issue?
Thank you, Gourab
Attachments:
Hello Gourab Chakraborty
Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.
If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.