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Experimental and numerical investigation on vibro-acoustic performance of a submerged stiffened cylindrical shell under multiple excitations
https://orcid.org/0000-0002-2637-6466
Highlights The vibration and noise test method and process of a submerged stiffened cylindrical shell under multi-source excitation are established. The numerical model of the stiffened cylindrical shell is established, and the effectiveness of the method is verified by experiment. The vibration and sound radiation tests of submerged stiffened cylindrical shell, in the frequency range of 10–2000 Hz, were carried out in an anechoic tank. The effects of single excitation and multi-source excitation on the vibro-acoustic of stiffened cylindrical shells are analyzed based on numerical method.
Abstract The underwater vibro-acoustic characteristics of a stiffened cylindrical shell have been investigated using experimental and numerical methods. A numerical analysis model is developed to capture the behavior of the cylindrical shell structure, and the validity of the model is verified based on experimental data. Experimental measurements are conducted in an anechoic tank to assess the vibration and acoustic radiation characteristics of the stiffened cylindrical shell under white noise excitations. Additionally, the disparities in underwater vibration noise characteristics of the stiffened cylindrical shell under both single excitation and multiple excitations are explored by numerical method. The experimental and numerical findings reveal that, within the frequency range of 10–2000 Hz, the stiffened cylindrical shell exhibits a rapid augmentation of low-frequency vibration noise followed by a gradual stabilization trend. This behavior can be attributed to the high density of low-frequency modes embedded within the structure. Furthermore, it is noteworthy that the underwater vibration noise of the cylindrical shell under multiple excitations arises not solely as a result of individual excitations being superimposed, but rather as a consequence of the intricate coupling effects induced by multiple excitations.
Experimental and numerical investigation on vibro-acoustic performance of a submerged stiffened cylindrical shell under multiple excitations
https://orcid.org/0000-0002-2637-6466
Highlights The vibration and noise test method and process of a submerged stiffened cylindrical shell under multi-source excitation are established. The numerical model of the stiffened cylindrical shell is established, and the effectiveness of the method is verified by experiment. The vibration and sound radiation tests of submerged stiffened cylindrical shell, in the frequency range of 10–2000 Hz, were carried out in an anechoic tank. The effects of single excitation and multi-source excitation on the vibro-acoustic of stiffened cylindrical shells are analyzed based on numerical method.
Abstract The underwater vibro-acoustic characteristics of a stiffened cylindrical shell have been investigated using experimental and numerical methods. A numerical analysis model is developed to capture the behavior of the cylindrical shell structure, and the validity of the model is verified based on experimental data. Experimental measurements are conducted in an anechoic tank to assess the vibration and acoustic radiation characteristics of the stiffened cylindrical shell under white noise excitations. Additionally, the disparities in underwater vibration noise characteristics of the stiffened cylindrical shell under both single excitation and multiple excitations are explored by numerical method. The experimental and numerical findings reveal that, within the frequency range of 10–2000 Hz, the stiffened cylindrical shell exhibits a rapid augmentation of low-frequency vibration noise followed by a gradual stabilization trend. This behavior can be attributed to the high density of low-frequency modes embedded within the structure. Furthermore, it is noteworthy that the underwater vibration noise of the cylindrical shell under multiple excitations arises not solely as a result of individual excitations being superimposed, but rather as a consequence of the intricate coupling effects induced by multiple excitations.
Experimental and numerical investigation on vibro-acoustic performance of a submerged stiffened cylindrical shell under multiple excitations
https://orcid.org/0000-0002-2637-6466
Highlights The vibration and noise test method and process of a submerged stiffened cylindrical shell under multi-source excitation are established. The numerical model of the stiffened cylindrical shell is established, and the effectiveness of the method is verified by experiment. The vibration and sound radiation tests of submerged stiffened cylindrical shell, in the frequency range of 10–2000 Hz, were carried out in an anechoic tank. The effects of single excitation and multi-source excitation on the vibro-acoustic of stiffened cylindrical shells are analyzed based on numerical method.
Abstract The underwater vibro-acoustic characteristics of a stiffened cylindrical shell have been investigated using experimental and numerical methods. A numerical analysis model is developed to capture the behavior of the cylindrical shell structure, and the validity of the model is verified based on experimental data. Experimental measurements are conducted in an anechoic tank to assess the vibration and acoustic radiation characteristics of the stiffened cylindrical shell under white noise excitations. Additionally, the disparities in underwater vibration noise characteristics of the stiffened cylindrical shell under both single excitation and multiple excitations are explored by numerical method. The experimental and numerical findings reveal that, within the frequency range of 10–2000 Hz, the stiffened cylindrical shell exhibits a rapid augmentation of low-frequency vibration noise followed by a gradual stabilization trend. This behavior can be attributed to the high density of low-frequency modes embedded within the structure. Furthermore, it is noteworthy that the underwater vibration noise of the cylindrical shell under multiple excitations arises not solely as a result of individual excitations being superimposed, but rather as a consequence of the intricate coupling effects induced by multiple excitations.
Experimental and numerical investigation on vibro-acoustic performance of a submerged stiffened cylindrical shell under multiple excitations
Tang, Yang (author) / Zhao, Zhe (author) / Qin, Yuxuan (author) / Pang, Fuzhen (author) / Du, Yuan (author) / Gao, Cong (author) / Li, Haichao (author)
Thin-Walled Structures ; 197
2024-01-04
Article (Journal)
Electronic Resource
English
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