TY JOUR TI CALCULATION OF PARAMETRICAL VIBRATIONS OF A SHIP SHAFT LINE SUBJECT TO RIGIDITY OF A STERN BEARING KW ship shaft line KW wear KW stern bearing KW parametrical vibrations KW Mathieu's equation JO Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies AU Migunov, A.. AU Mamontov, V.. AU Khalyavkin, A.. PY 2017 IS 2017 PB Astrakhan State Technical University