AN INVESTIGATION OF POWER FLOW IN THE MID-FREQUENCY RANGE FOR SYSTEMS OF CO-LINEAR BEAMS BASED ON A HYBRID FINITE ELEMENT FORMULATION

A hybrid finite element analysis (hybrid FEA) is employed for investigating power flow characteristics for systems of co-linear beams in the mid-frequency range. The importance of capturing power re-injection and power re-radiation effects in the solution is demonstrated. The dependency of the power flow characteristics of a system in the mid-frequency range on the rigidity, mass, and damping properties of its components is determined. Both the hybrid FEA and analytical solutions are employed for analyses in order to establish the viability of the hybrid FEA as a simulation technology in the mid-frequency range. Results from a high-frequency method are compared to hybrid FEA solutions in order to demonstrate the importance of capturing the resonant effects in mid-frequency computations.