DanJordy
Mechanical
- Jun 14, 2005
- 16
Can anyone advise me, or point me to a resource that can help me with the following problem.
I'd like to analyze the fluid-structural problem for a clamped-clamped beam being subjected to an inertial half-sine acceleration using the ACEL command (like what would occur if the system is drop tested). There is fluid (air) between the beam and a fixed wall. As the beam deflects, it squeezes the fluid out from between itself and the fixed wall, creating a damping effect.
I have already used a squeeze film approximation (FLUID136) to obtain a damping ratio, which I can apply to a transient analysis to obtain the damped response. What I want to do now is to look at the change in damping as the beam undergoes a large transient deflection by using the Multi-Field Solver (FLUID142). My interest is in how the damping changes as the beam undergoes a significant displacement due to the inertial accleration.
Does anyone know of a resource for this type of problem? Are there any alternatives that I could try?
I have already ran simulations on the problem, but am not sure of the results. I can include the listing here.
Regards,
Dan Jordy
I'd like to analyze the fluid-structural problem for a clamped-clamped beam being subjected to an inertial half-sine acceleration using the ACEL command (like what would occur if the system is drop tested). There is fluid (air) between the beam and a fixed wall. As the beam deflects, it squeezes the fluid out from between itself and the fixed wall, creating a damping effect.
I have already used a squeeze film approximation (FLUID136) to obtain a damping ratio, which I can apply to a transient analysis to obtain the damped response. What I want to do now is to look at the change in damping as the beam undergoes a large transient deflection by using the Multi-Field Solver (FLUID142). My interest is in how the damping changes as the beam undergoes a significant displacement due to the inertial accleration.
Does anyone know of a resource for this type of problem? Are there any alternatives that I could try?
I have already ran simulations on the problem, but am not sure of the results. I can include the listing here.
Regards,
Dan Jordy