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.
Explicitly define spring and dashpot coefficients
Posted 2 feb 2024, 05:42 GMT-5 Modeling Tools & Definitions, Equation-Based Modeling, Structural Dynamics 1 Reply
Please login with a confirmed email address before reporting spam
Hi,
I am performing an Frequency Domain analysis for a simple structure. The soil is represented by the springs and dashpots. However, the issue is that the spring/dashpot coefficients depend on the frequency and are explicitly defined in the table (i.e. for 1Hz -> K1, C1; for 2Hz -> K2, C2; ...).
I am not sure how to: (1) input that values into COMSOL in a table format (if I even need it) (2) apply springs and damping dashpots that would take the values from the table for each individual frequency
I hope someone will be able to help me
Bests, Irakli
Please login with a confirmed email address before reporting spam
You can make an Interpolation under Definitions. It may have a name such int1. Then, make a variable K1 (Definitions->Variables). And define that as int1(freq), where freq is a frequency variable defined already within COMSOL. Under the spring you set the stiffness to K1, and when you run a frequency sweep, the frequency dependency of K1 is known.
-------------------René Christensen, PhD
Acculution ApS
www.acculution.com
info@acculution.com