Imperial College London
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ProfessorMatthewSanter

Faculty of Engineering, Department of Aeronautics

Professor of Aerospace Structures
 
 
 
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Contact

 

+44 (0)20 7594 5117m.santer

 
 
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Location

 

335City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@inproceedings{Nightingale:2022:10.2514/6.2022-0381,
author = {Nightingale, M and Hewson, R and Santer, M and Muir, MJ},
doi = {10.2514/6.2022-0381},
title = {Multiscale Optimization of Resonant Frequencies in a Payload Attach Fitting Using a Metamaterial Lattice Approach},
url = {http://dx.doi.org/10.2514/6.2022-0381},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - CPAPER
AB  - In this work a method of tailoring the resonant frequencies of a Payload Attach Fitting (PAF) is presented. The work uses a multiscale, functionally-graded metamaterial optimization approach to predict and alter the structural and dynamic properties of the PAF tower. This allows for tailoring of the resonant frequencies of the PAF-payload system in order to avoid dangerous resonant modes. The metamaterial used is a 7 member, body-centered lattice structure with spatially-varying truss radii. An interior point algorithm is employed where the truss radii represent the design variables and the unit cell structural properties are homogenized for use in the macro scale optimization. The capabilities of the method to tailor resonant frequencies is demonstrated by maximizing the sum of the first 3 resonant frequencies of the tower. These frequencies are then compared with the resonant frequencies of the original tower with the same payload and boundary conditions. A mode shape tracking algorithm and corresponding constraint have also been implemented in the optimization. For the same mass, the multiscale approach is able to increase the first resonant frequency by 26.6 %. The sum of the first 3 resonant frequencies is also increased by 20.0 %. This ability to control resonant frequencies offers greater functionality and improved flexibility. Engineers are able to tailor structures for multiple launch environments whilst also reducing weight and costs of the PAF structures.
AU  - Nightingale,M
AU  - Hewson,R
AU  - Santer,M
AU  - Muir,MJ
DO  - 10.2514/6.2022-0381
PY  - 2022///
TI  - Multiscale Optimization of Resonant Frequencies in a Payload Attach Fitting Using a Metamaterial Lattice Approach
UR  - http://dx.doi.org/10.2514/6.2022-0381
ER  -
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