On Sampling Methods for Inverse Biharmonic Scattering Problems in Supported Plates
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866910063344484352 |
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| author | Borges, Carlos Ayala, Rafael Ceja Nekrasov, Peter |
| author_facet | Borges, Carlos Ayala, Rafael Ceja Nekrasov, Peter |
| contents | We study the inverse problem of qualitatively recovering a supported cavity in a thin elastic plate governed by the flexural (biharmonic) wave equation, using far-field pattern measurements. We derive a reciprocity principle and a factorization of the far-field operator for the supported plate boundary conditions, and we analyze its range properties to justify both the linear sampling method (LSM) and the direct sampling method (DSM). Numerical experiments assess the performance of LSM and DSM under noise, a limited amount of data, multiple scattering, and variations in the Poisson's ratio. The results show that both methods robustly recover the obstacle's location and convex hull, with DSM offering improved stability and reduced computational cost. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2603_21477 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | On Sampling Methods for Inverse Biharmonic Scattering Problems in Supported Plates Borges, Carlos Ayala, Rafael Ceja Nekrasov, Peter Numerical Analysis Mathematical Physics Analysis of PDEs 65N21, 35R30, 35J40 We study the inverse problem of qualitatively recovering a supported cavity in a thin elastic plate governed by the flexural (biharmonic) wave equation, using far-field pattern measurements. We derive a reciprocity principle and a factorization of the far-field operator for the supported plate boundary conditions, and we analyze its range properties to justify both the linear sampling method (LSM) and the direct sampling method (DSM). Numerical experiments assess the performance of LSM and DSM under noise, a limited amount of data, multiple scattering, and variations in the Poisson's ratio. The results show that both methods robustly recover the obstacle's location and convex hull, with DSM offering improved stability and reduced computational cost. |
| title | On Sampling Methods for Inverse Biharmonic Scattering Problems in Supported Plates |
| topic | Numerical Analysis Mathematical Physics Analysis of PDEs 65N21, 35R30, 35J40 |
| url | https://arxiv.org/abs/2603.21477 |