臺灣博碩士論文加值系統

FRP複合材料具有良好的匿蹤性且重量輕，近年來FRP於軍艦之使用性逐漸被研究與開發，而水下爆炸為軍事船舶不可忽視的議題，其為巨大衝擊波及氣泡脈衝等負荷，瞬間作用於結構之現象，屬於高應變率之結構響應。本論文利用水下爆震試驗及模擬方法來驗證FRP結構之抗爆震能力，並分別使用靜態和高應變率下的材料參數進行模擬，比較實驗與模擬的差異。
本論文在建立模型時，選用兩種不同的積層結構，分別為厚殼及三明治結構。模擬部分使用ABAQUS中聲-固耦合方法及UNDEX模型進行水下爆炸模擬。模擬結果顯示，比較不同材料參數時發現高應變率作用下，FRP之剛性降低約50%，高應變率下的應變值較高於靜態材料參數的應變。進行實驗後發現三明治結構的變形量較小，此趨勢與模擬結果相同，因此判斷三明治結構較厚殼結構耐炸。另外，靜態材料參數結果較接近三明治結構的實驗結果，動態材料參數結果較接近厚殼的實驗結果，綜合應變結果及參數取得成本判斷，FRP應用於艦艇結構時選用三明治結構較為優異。

FRP composite materials have good stealth and lightweight. In recent years, the use of FRP in warships has been gradually researched and developed, and underwater explosions are a topic that cannot be ignored for military ships. They are loads such as huge shock waves and bubble pulses. The phenomenon acting on the structure belongs to the structural response of a high strain rate. In this paper, the underwater detonation test and simulation method is used to verify the anti-detonation ability of FRP structures, the material parameters under static and high strain rates are used for simulation, respectively, and the difference between the experiment and the simulation is compared.
When building the model in this thesis, two different laminated structures are selected: laminate shell and sandwich structure. The acoustic-solid coupling method in ABAQUS and the UNDEX model simulates the underwater explosion in the simulation part. The simulation results show that when comparing different material parameters, it is found that under the action of a high strain rate, the rigidity of FRP is reduced by about 50%, and the strain value under a high strain rate is higher than that of static material parameters. After the experiment, the sandwich structure's deformation is small, and this trend is the same as the simulation result. Therefore, it is judged that the sandwich structure is more resistant to explosion than the laminate shell structure. In addition, the static material parameter results are closer to the experimental results of the sandwich structure, and the dynamic material parameter results are more comparable to the experimental results of the laminate shell. The cost judgment is obtained by combining the strain results and parameters, and the sandwich structure is better when FRP is applied to the naval design.

摘 要 I
ABSTRACT II
目錄 IV
圖目錄 VI
表目錄 VIII
符號表 IX
第一章 緒論 1
1.1研究動機 1
1.2 文獻回顧 1
1.3 論文架構 7
第二章 研究方法 9
2.1 水下爆震理論 9
2.2 水下爆炸數值分析 13
第三章 模型設計與製作 18
3.1 試驗模型設計 18
3.1.1 材料參數計算 18
3.1.2 FRP破壞準則 20
3.2 設計條件 22
3.3 試驗模型製作 25
第四章 水下爆炸模擬 33
4.1 數值模型及材料參數 33
4.2 邊界條件 37
4.3 分析結果 42
4.3.1 厚殼應變分析結果 43
4.3.2 三明治殼應變分析結果 44
第五章 實驗與模擬結果比較 46
5.1 氣泡變化歷程 46
5.2 爆壓計驗證 47
5.3 破壞結果比較 48
5.4 應變量測結果比較 51
5.4.1厚殼結果比較 51
5.4.2三明治殼結果比較 54
5.4 小結 56
第六章 結論與未來展望 58
6.1 結論 58
6.2 未來展望 59
參考文獻 60

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