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<p>This paper investigates the use of hierarchical honeycomb core configurations for the design of lightweight mirrors for future space-based telescopes. Several mirror blanks featuring distinct types of hierarchical honeycomb cores, alongside classical honeycomb cores, were designed and analyzed under various load scenarios using the finite element analysis software ANSYS. Each type of hierarchy included multiple different designs, their geometrical parameters were adjusted to achieve a mass constraint of 10&#xa0;kg ± 1%. Results demonstrate significant performance enhancements with hierarchical core designs over classical honeycomb core ones, achieving improvements of 33.6% and 32.31% in peak-to-valley and root mean square surface figure errors due to axial gravity, respectively, 28.5% and 26.2% in peak-to-valley and root mean square errors due to lateral gravity. Additionally, a 21.21% increase in first-order Eigen-frequency has been achieved.</p>

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Design and performance evaluation of lightweight mirror blanks for space-based telescopes based on various hierarchical honeycomb cores

  • 期刊论文

  • 发表日期：

    2025年2月5日

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  • Mahdi Rahmani,
  • Mohamed Bouafia

摘要

This paper investigates the use of hierarchical honeycomb core configurations for the design of lightweight mirrors for future space-based telescopes. Several mirror blanks featuring distinct types of hierarchical honeycomb cores, alongside classical honeycomb cores, were designed and analyzed under various load scenarios using the finite element analysis software ANSYS. Each type of hierarchy included multiple different designs, their geometrical parameters were adjusted to achieve a mass constraint of 10 kg ± 1%. Results demonstrate significant performance enhancements with hierarchical core designs over classical honeycomb core ones, achieving improvements of 33.6% and 32.31% in peak-to-valley and root mean square surface figure errors due to axial gravity, respectively, 28.5% and 26.2% in peak-to-valley and root mean square errors due to lateral gravity. Additionally, a 21.21% increase in first-order Eigen-frequency has been achieved.