Transient Vibration Analysis of An Optimized FML Cylindrical Shell Based on Maximum Reliability

• Published in: International journal of advanced design and manufacturing technology Vol. 18; no. 1; pp. 51 - 63
• Main Authors: Alireza Pourmoayed, Keramat Malekzadeh Fard, ali nazari
• Format: Journal Article
• Language: English
• Published: Islamic Azad University-Isfahan (Khorasgan) Branch 01.04.2025
• Subjects: fiber orientation; fml shell; layup; reliability; transient vibration
• ISSN: 2252-0406; 2383-4447

The transient vibration analyses of optimised Fibre Metal Laminates Cylindrical shells were examined in this paper. One of the most innovative aspects of this study is identifying an applied trend for optimizing the FML cylindrical shell construction to achievemaximum reliability. The FML shell reliability is determined using the First Order Reliability Method (FORM) and the Hashin failure criteria. Toachieve this objective, the Shell is constantly subjected to a static load, and the resulting tensions within the FML layers of the shell are measured. The maximum tension is determined using the Hashin method, and the stability of the shell is subsequently estimated. Next, the amounts of reliability are certified according to shell stability. To maximize the FML shell reliability, the sequence of the composite-metal layers and fibre orientation are often modified, and for each case, the sample reliability is calculated. The second section of this study examines the effect of the optimized structure of the FML shells on the acceleration and displacement of these shells under dynamic loading. The energy approach is used to obtain the Equations of motion, whereas the mode superposition method is employed for transient vibration analysis.