Faculty Publications
Permanent URI for this communityhttps://idr.nitk.ac.in/handle/123456789/18736
Publications by NITK Faculty
Browse
2 results
Search Results
Item Acoustic Response of an Isotropic Beam under Axially Variable Loads Using Ritz and Rayleigh Integral Methods(Polska Akademia Nauk, 2022) Somi Naidu, S.N.; Jeyaraj, J.; Mailan Chinnapandi, L.B.; Reddi Chintapalli, V.S.N.R.Vibro-acoustic response of an isotropic beam under the action of variable axial loads (VALs), is presented in the study. Effects of six different types of VALs and three types of end conditions on buckling, free vibration and sound radiation characteristics are investigated. Static buckling and free vibration behaviours using shear and normal deformable theorem and Ritz method. However, the forced vibration response is evaluated using modal superposition method and the acoustic radiation characteristics are obtained using Rayleigh integral. The nature of variation of VALs and end conditions are influencing buckling and free vibration characteristics remarkably. Results indicate that the acoustic response is highly sensitive to the nature of VAL and intensity of the VAL. In general, sound power at resonance decreases when the magnitude of VAL is increased. © © 2022 S.N. Balireddy et al.Item Sound radiation and transmission behavior of auxetic core quadrilateral sandwich panels under supersonic flow(Taylor and Francis Ltd., 2025) Prajapati, V.K.; Jeyaraj, P.; Mailan Chinnapandi, L.B.Vibroacoustic performance of a quadrilateral sandwich plate under the synergetic effect of aerodynamic pressure and harmonic excitation is analyzed numerically. Layered approach is adopted to model the sandwich plate by considering the equivalent properties of the core and facings. Governing equations, developed utilizing Hamilton’s principle are solved based on differential quadrature approach to analyze the flutter frequency and forced vibration response. Subsequently, Rayleigh integral is used to estimate the acoustic response characteristics. Effect of geometric properties of the core (cell size, wall thickness, and inclined angle) and plate (leading, and trailing-edge angles) is examined. Critical aerodynamic pressure (CAP) is calculated first for the given case and the changes in response characteristics are investigated by varying the CAP. Results indicate that geometric parameters of the core does not influence the CAP, while the core thickness and the leading and trailing edge angles have significant effects. The sound power level (SWL) and transmission loss are observed to be maximum at CAP except in some cases of leading and trailing edge angles. © 2025 Taylor & Francis Group, LLC.