Analysis of influence of the geometric parameters of mast systems on the natural frequency and vibration mode spectrumVladimir Grinyov, Tatyana Alyoshechkina, Vitaliy Vynogradov and Ekaterina PerepelytsaMATEC Web Conf., 116 (2017) 02015DOI: https://doi.org/10.1051/matecconf/201711602015