【摘要】：基于有限元方法與應力波理論,以近海工程海洋打樁錘為研究對象,分析了沉樁過程中沖擊機械系統(tǒng)的動力學響應。基于有限元分析軟件LS-dyna,建立某型海洋打樁錘沉樁過程的有限元模型,還原模擬了海洋打樁錘的某次灘涂的施工打樁作業(yè),分析了沖擊緩沖裝置在海洋打樁錘系統(tǒng)中的作用,討論了沉樁過程中錘芯和樁內(nèi)部的能量傳遞規(guī)律,預測了關鍵部件的動力學響應。有限元預測結果與現(xiàn)場實際沉樁記錄充分接近,表明文中建立的模型和仿真結果是正確的。
[Abstract]:Based on the finite element method and the stress wave theory, the dynamic response of the impact mechanical system in the process of piling is analyzed with the offshore engineering pile hammer as the research object. Based on the finite element analysis software LS-dyna, the finite element model of the piling process of a certain type of ocean piling hammer is established, and the construction and piling operation of a certain beach of the ocean piling hammer is reduced and simulated, and the function of the shock buffer device in the marine piling hammer system is analyzed. The law of energy transfer between hammer core and pile during piling is discussed, and the dynamic response of key components is predicted. The result of finite element prediction is close to the actual pile driving record, which shows that the model and simulation results are correct.
【作者單位】： 同濟大學機械與能源工程學院;
【基金】：國家自然科學基金項目(51075304,51205292)資助
【分類號】：P751
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本文編號：2178503