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A platform for research: civil engineering, architecture and urbanism
Shape sensing for thin-shell spaceborne antennas with adaptive isogeometric analysis and inverse finite element method
https://orcid.org/0000-0003-4795-2087
https://orcid.org/0000-0001-7342-9180
https://orcid.org/0000-0002-7856-2009
Highlights A novel shape sensing method is proposed for the full displacement field reconstruction of thin shell structures. The inherent advantages of adaptive isogeometric analysis with the superior capabilities of iFEM are integrated. The adaptive hierarchical mesh refinement is automatically implemented with high accuracy and flexibility. In-situ discrete strain data are enriched by the smoothing technique to effectively support inverse reconstruction.
Abstract As the preventive maintenance paradigm transfers to condition-based maintenance, deformation monitoring has become a fundamental system capacity in aerospace engineering. In this study, a novel shape sensing method is proposed for accurate and efficient reconstruction of full-field deformation of thin shell structures from discrete strain measurements. Firstly, a flexible isogeometric approach based on the geometry-independent field approximation is developed for characterizing the geometric and physical domains, which fully unlocks the potential of local refinement while preserving the original exact geometry without re-parameterization. On this basis, a posteriori error estimation algorithm is put forward to automatically drive the adaptive refinement procedure, reducing the discretization error with a fast convergence rate. Subsequently, according to the Kirchhoff-Love theory and the least-squares variational principle, an isogeometric inverse-shell element is created to integrate the inherent advantages of adaptive isogeometric analysis with excellent shape-sensing capabilities of the inverse finite element method. Moreover, a smoothing technique is applied to replenish strain data into each inverse shell element, by which the compatibility between the interpolated and measured strain components is also enforced. Finally, the excellent accuracy and efficiency of the proposed deformation reconstruction framework are verified using both experimental and numerical strain data for two thin-shell spaceborne antennas.
Shape sensing for thin-shell spaceborne antennas with adaptive isogeometric analysis and inverse finite element method
https://orcid.org/0000-0003-4795-2087
https://orcid.org/0000-0001-7342-9180
https://orcid.org/0000-0002-7856-2009
Highlights A novel shape sensing method is proposed for the full displacement field reconstruction of thin shell structures. The inherent advantages of adaptive isogeometric analysis with the superior capabilities of iFEM are integrated. The adaptive hierarchical mesh refinement is automatically implemented with high accuracy and flexibility. In-situ discrete strain data are enriched by the smoothing technique to effectively support inverse reconstruction.
Abstract As the preventive maintenance paradigm transfers to condition-based maintenance, deformation monitoring has become a fundamental system capacity in aerospace engineering. In this study, a novel shape sensing method is proposed for accurate and efficient reconstruction of full-field deformation of thin shell structures from discrete strain measurements. Firstly, a flexible isogeometric approach based on the geometry-independent field approximation is developed for characterizing the geometric and physical domains, which fully unlocks the potential of local refinement while preserving the original exact geometry without re-parameterization. On this basis, a posteriori error estimation algorithm is put forward to automatically drive the adaptive refinement procedure, reducing the discretization error with a fast convergence rate. Subsequently, according to the Kirchhoff-Love theory and the least-squares variational principle, an isogeometric inverse-shell element is created to integrate the inherent advantages of adaptive isogeometric analysis with excellent shape-sensing capabilities of the inverse finite element method. Moreover, a smoothing technique is applied to replenish strain data into each inverse shell element, by which the compatibility between the interpolated and measured strain components is also enforced. Finally, the excellent accuracy and efficiency of the proposed deformation reconstruction framework are verified using both experimental and numerical strain data for two thin-shell spaceborne antennas.
Shape sensing for thin-shell spaceborne antennas with adaptive isogeometric analysis and inverse finite element method
https://orcid.org/0000-0003-4795-2087
https://orcid.org/0000-0001-7342-9180
https://orcid.org/0000-0002-7856-2009
Highlights A novel shape sensing method is proposed for the full displacement field reconstruction of thin shell structures. The inherent advantages of adaptive isogeometric analysis with the superior capabilities of iFEM are integrated. The adaptive hierarchical mesh refinement is automatically implemented with high accuracy and flexibility. In-situ discrete strain data are enriched by the smoothing technique to effectively support inverse reconstruction.
Abstract As the preventive maintenance paradigm transfers to condition-based maintenance, deformation monitoring has become a fundamental system capacity in aerospace engineering. In this study, a novel shape sensing method is proposed for accurate and efficient reconstruction of full-field deformation of thin shell structures from discrete strain measurements. Firstly, a flexible isogeometric approach based on the geometry-independent field approximation is developed for characterizing the geometric and physical domains, which fully unlocks the potential of local refinement while preserving the original exact geometry without re-parameterization. On this basis, a posteriori error estimation algorithm is put forward to automatically drive the adaptive refinement procedure, reducing the discretization error with a fast convergence rate. Subsequently, according to the Kirchhoff-Love theory and the least-squares variational principle, an isogeometric inverse-shell element is created to integrate the inherent advantages of adaptive isogeometric analysis with excellent shape-sensing capabilities of the inverse finite element method. Moreover, a smoothing technique is applied to replenish strain data into each inverse shell element, by which the compatibility between the interpolated and measured strain components is also enforced. Finally, the excellent accuracy and efficiency of the proposed deformation reconstruction framework are verified using both experimental and numerical strain data for two thin-shell spaceborne antennas.
Shape sensing for thin-shell spaceborne antennas with adaptive isogeometric analysis and inverse finite element method
Yu, Dewen (author) / Wang, Shun (author) / Li, Weidong (author) / Yang, Yaowen (author) / Hong, Jun (author)
Thin-Walled Structures ; 192
2023-08-29
Article (Journal)
Electronic Resource
English
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