Polynomial approximation for longitudinal wave dispersion in rods
More information can be found in the following paper:
Brizard, D., E. Jacquelin, and S. Ronel. 2019. ‘Polynomial Mode Approximation for Longitudinal Wave Dispersion in Circular Rods’. Journal of Sound and Vibration 439 (January): 388–97. https://doi.org/10.1016/j.jsv.2018.09.062.