Modal analysis of ship's mast structure using effective mass participation factor

Ahmad, Muhammad Sajjad; Jamil, Mohsin; Iqbal, Javid; Khan, Muhammad Nasir; Malik, Mazhar Hussain; Butt, Shahid Ikramullah

Abstract

Background/Objectives: Each structure tends to vibrate at particular frequencies, called resonant or natural frequencies. When a structure is excited by dynamic load with frequency coinciding one of its natural frequencies the structure experiences stresses and large displacements. In this paper effective mass participation factor criterion is used to solve the vibration problem in the ship mast. Methods/Statistical Analysis: The effective mass participation factor provides a measure of the energy contained within each resonant mode. Vibration problem originated when one of the antenna at top of mast was replaced by a new antenna with greater mass at same location. The overall mast structure started vibrating because of the resonance of natural frequencies of the mast structure with natural frequencies of rotary equipment. Findings: It caused interruption in sensitivity of equipment installed on the mast structure. Instead of fabricating the new mast structure, some alteration has been carried out on the basis of results obtained from modal analysis. Application/Improvements: The study is very effective to overcome the vibration problems in ship mast.

• Journal Article Type: Article
• Acceptance Date: Feb 5, 2016
• Online Publication Date: May 6, 2016
• Publication Date: May 6, 2016
• Deposit Date: Mar 16, 2023
• Publicly Available Date: Mar 20, 2023
• Journal: Indian Journal of Science and Technology
• Print ISSN: 0974-6846
• Electronic ISSN: 0974-5645
• Peer Reviewed: Peer Reviewed
• Volume: 9
• Issue: 21
• DOI: https://doi.org/10.17485/ijst/2016/v9i21/94830
• Keywords: Multidisciplinary; Effective Mass Participation; Modal Analysis; Mode Shape; Ship Mast
• Public URL: https://uwe-repository.worktribe.com/output/10555294
• Publisher URL: https://indjst.org/articles/modal-analysis-of-ships-mast-structure-using-effective-mass-participation-factor