TY JOUR TI AUTOMATING THE METHOD OF CALCULATING NATURAL FREQUENCY OF PROPELLER SHAFT TRANSVERSE VIBRATIONS KW ship shafting KW transverse vibrations KW natural frequency KW automated calculation KW propeller shaft KW sliding bearing JO Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies AU Abacharaev, I.. AU Bulgakov, V.. AU Kushner, G.. AU Mamontov, V.. PY 2019 IS 2019 PB Astrakhan State Technical University