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Outline
Accurate prediction of radiated sound fields from underwater structures with limited measurement points is crucial for vibration and noise reduction studies. This paper presents an investigation on a rectangular plate and the proposal of a measurement point arrangement strategy based on Gaussian integration point distribution. The surface vibration velocity field of the structure was reconstructed using an L1 norm sparse solution, and the acoustic radiation sound field was predicted through vibro-acoustic transfer functions. Under the constraint of limited measurement points, the effects of truncated modal order, number of measurement points, and their arrangement on the prediction accuracy of the radiated sound field were analyzed. Results show that, within the mid-to-low frequency range, the Gaussian integration point distribution strategy optimizes sensor placement. Compared with traditional uniformly distributed measurement methods, the proposed strategy could achieve an accurate prediction of the radiated sound field with fewer measurement points, providing theoretical support for engineering applications involving sound field prediction under limited sensor conditions.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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