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| Equivalent excitation force inversion method in ship vibration and acoustics optimization |
| Received:November 16, 2020 Revised:April 21, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20201116002 |
| KeyWord:equivalent force inversion method vibration acceleration response underwater acoustic radiation vibration acceleration loads acoustic optimization design |
| Author | Institution |
| 易跃峰 |
上海交通大学 海洋工程国家重点实验室, 上海 |
| 杨德庆 |
上海交通大学 海洋工程国家重点实验室, 上海 |
| 刘西安 |
上海交通大学 海洋工程国家重点实验室, 上海 |
| 陈林 |
中国船舶与海洋工程设计研究院, 上海 |
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| Abstract: |
| When excitation loads are given as vibrational accelerations,it’s common that Large Mass Method and Direct Acceleration Method are used to compute structural dynamic responses in engineering.However,these methods cannot be used in natural frequency analysis and structural dynamic re-analysis during optimization iterations.According to the inherent invariability of excitation force of equipment,an Equivalent Force Inversion Method is proposed to predict underwater acoustic radiation and conduct the structural acoustic optimization.Taking a ship cabin as an example,the sound power of underwater acoustic radiation for the test and the computation based on the proposed equivalent inversion force is 92.33 dB and 93.84 dB,respectively.Meanwhile,structural vibration and acoustic radiation before and after structural acoustic optimization are compared through different loading methods.It shows that Equivalent Force Inversion Method is the preferred method for dynamic loads in the prediction and optimization of underwater acoustic radiation. |
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