Modal, Harmonic and Dynamic Behaviour Evaluation of a Diesel Generator Canopy Frame Using Finite Element Techniques

Mr. Govind Rajabhau Bhosle, Dr. N. A. Rawabawale, Dr. B. S. Allurkar, Prof. S. M. Nagure

Finite Element Analysis, Modal Behaviour, Harmonic Response, Dynamic Evaluation, Diesel Generator, Structural Vibration

Diesel generators experience continuous vibration and fluctuating forces during operation, which are transferred to the supporting canopy frame [1],[7]. If not structurally optimised, such vibration may trigger deformation, resonance, or long-term fatigue failures [1],[6],[11]. This study investigates the vibratory behaviour of a heavy-duty genset canopy frame through modal, harmonic and dynamic finite element analyses [3],[4]. A 3D structural model was developed in SOLIDWORKS and examined under multiple frequency-dependent loading scenarios [7]. Natural frequencies and mode shapes were extracted through modal analysis, while harmonic simulations assessed deformation under sinusoidal excitation typical of diesel engines [1],[9]. Additional dynamic simulations evaluated stability under varying operational frequencies [11],[12]. Results show that the frame’s natural frequencies do not coincide with the standard excitation range of generator engines, eliminating resonance risk [9],[11]. Harmonic response curves indicate low displacement amplitudes, confirming the structural rigidity of the canopy [2],[7]. The study concludes that the existing frame configuration demonstrates robust dynamic performance, suitable for industrial generator applications [10],[12].

Received: 22 Nov 2025, Received in revised form: 21 Dec 2025, Accepted: 26 Dec 2025, Available online: 30 Dec 2025

10.22161/ijaers.1212.8