【摘要】：SPH方法作為一種具有無(wú)網(wǎng)格、拉格朗日性質(zhì)的動(dòng)力學(xué)求解算法,已經(jīng)廣泛應(yīng)用于沖擊動(dòng)力學(xué)的研究。采用SPH-FEM耦合分析和8組試驗(yàn)進(jìn)行半球殼沖擊土壤的對(duì)比分析,比較加速度時(shí)程曲線和局部變形圖,驗(yàn)證SPHFEM方法在處理此類問(wèn)題中的適用性。利用SPH-FEM方法得到的能量和沖擊力時(shí)程曲線,歸納出土壤的能量耗散機(jī)理。分析表明,數(shù)值模擬結(jié)果和試驗(yàn)結(jié)果吻合較好,SPH-FEM方法能勝任模擬半球殼沖擊土壤的整個(gè)過(guò)程。土壤是一種很好的能量緩沖體。
[Abstract]:As a meshless and Lagrangian dynamic solution method, SPH method has been widely used in the research of impact dynamics. The SPH-FEM coupling analysis and eight sets of experiments were used to compare the acceleration history curve and the local deformation diagram of the hemispherical shell impact soil. The applicability of SPHFEM method in dealing with this kind of problems was verified. Based on the energy and impact time history curves obtained by SPH-FEM method, the energy dissipation mechanism of soil was summarized. The analysis shows that the numerical simulation results are in good agreement with the experimental results. The SPH-FEM method is capable of simulating the whole process of the hemispherical shell impact soil. Soil is a good energy buffer.
【作者單位】： 貴州大學(xué)空間結(jié)構(gòu)研究中心;貴陽(yáng)市人民防空辦公室;
【基金】：國(guó)家自然科學(xué)基金(50978064)
【分類號(hào)】：S152
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本文編號(hào)：2121684