SIMP for Complex Structures

Abstract:

Designing structures with frequency constraints is an important task in aerospace engineering. Aerodynamic loading, gust loading, and engine vibrations all impart dynamic loads upon an airframe. To avoid structural resonance and excessive vibration, the natural frequencies of the structure must be shifted away from the frequency range of any dynamic loads. Care must also be taken to ensure that the modal frequencies of a structure do not coalesce, which can lead to dramatic structural failure. So far in industry, no aircraft lifting surfaces are designed from the ground up with frequency optimisation as the primary goal. This paper will explore computational methods for achieving this task.This paper will present a topology optimisation algorithm employing the Solid Isotropic Microstructure with Penalisation (SIMP) method for the design of an optimal aircraft wing structure for rejection of frequency excitation.

• Periodical: Applied Mechanics and Materials (Volume 846)
• Pages: 535-540
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.846.535
• Online since: July 2016
• Authors: David J. Munk, David W. Boyd*, Gareth A. Vio
• Keywords: Natural Frequency, SIMP Method, Topology Optimisation, Vibration

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