Available online at www.sciencedirect.com ScienceDirect Materials Today: Proceedings 5 (2018) 24387–24396 www.materialstoday.com/proceedings 2214-7853 © 2018 Elsevier Ltd. All rights reserved. Selection and/or Peer-review under responsibility of International Conference on Advances in Materials and Manufacturing Applications [IConAMMA 2017]. IConAMMA_2017 Acoustic radiation characteristics of un-baffled laminated composite conical shell panels Nitin Sharma a, *, Trupti Ranjan Mahapatra a , Subrata Kumar Panda b , Abhisek Mazumdar a a School of Mechanical Engineering, KIIT University, Bhubaneswar, Odisha 751024, India b Department of Mechanical Engineering, National Institute of Technology, Rourkela, Odisha 769008 India Abstract This article presents a study on the vibro-acoustic behavior of laminated composite conical shell panels subjected to harmonic point excitation. The shell panel model is developed in the framework of the first order shear deformation theory using commercial software package ABAQUS. Finite element method (FEM) is used to perform the free vibration analysis followed by the acoustic analysis performed using boundary element method (BEM) in LMS Virtual.Lab environment. The natural frequency and the sound power radiated by the panel are computed using the present scheme and validated with the results published in the available literature. The influence of the excitation location, lamination scheme and support conditions on the vibro-acoustic behavior of the laminated composite conical panels is investigated. The excitation location greatly influences the first, second resonant modes. The radiated sound power is found to be increasing with decreasing number of edge constraints. © 2018 Elsevier Ltd. All rights reserved. Selection and/or Peer-review under responsibility of International Conference on Advances in Materials and Manufacturing Applications [IConAMMA 2017]. Keywords: Laminated composite conical panel; modal analysis; ABAQUS; coupled FEM-BEM; radiated sound power; radiaiton efficiency 1. Introduction Present day engineering structures have to meet the requirements such as high strength to weight ratio, high resistance to failure due dynamic, shock loading etc. In addition to this, the sound radiation and transmission characteristics of the structures are taken into consideration during the design phase and are tuned so as to have * Corresponding author. Tel.: +91-9861425597 E-mail address: trmahapatrafme@kiit.ac.in, truptiranjan01@gmail.com