Abstract

Described are some structural aspects of a finite element model used in the design stage to predict vibration levels of a 150,000 SHP triple screw, high speed trailership. The mode shapes of the model show that at blade frequencies of operating RPM the hull does not vibrate as a beam in bending, sh earing and twisting, but rather the decks and double bottom move with different wave lengths, amplitudes and phases. Hull flexibility can significantly affect the transverse vibration frequencies of propulsion shafts. The response of the model shows the importance of detuning of propulsion system resonant frequencies from operating RPM. The proper use of the finite element method in the calculation of propulsion system longitudinal vibration is suggested.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.