Fluid-Structure Coupling Analysis for Fracturing process by High Energy Release

高能释放压裂过程流固耦合分析

• 批准号: 18310118
• 负责人: MATSUO Akiko
• 金额: $ 5.51万
• 依托单位: Keio University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18310118/
• 关键词: explosion; blast wave; computer simulation; detonation; deflagration; DEM; unified approach

Continuous-DEM (C-DEM) was proposed by enabling the reproduction of the deviatoric stress by introducing the concept of continuum mechanics. Simulations of impact problems, interaction between blast and metal, shock and water column was performed by the C-DEM. Validation of the suggested method and the code was carried out by comparing the results with theoretical and experimental results along with results obtained by reliable commercial codes. The conclusions of this study are summarized as follows.1. Establishment of the Continuous-DEMImprovement in the procedure of obtaining spring strains was conducted. This implement in the C-DEM enabled the DEM, usually applied to discontinuous analysis, to apply constitutive laws based on continuum mechanics calculation. Stabilization of the analytical results was additionally attained by application of artificial viscosities.2. C-DEM validation by impact analysisOne-dimensional (1D) results of impact to rigid wall well agreed with theoretical … More values. Two-dimensional (2D) plastic deformation of metals has qualitatively reproduced experimental results. 1D impact problem was evaluated by comparing the results theoretically and by another method. The C-DEM and AUTODYN[○!R] showed good agreement in 2D impact between SUS 304 flyer and target.3. Simulation of one-dimensional blast-metal interactionThe interaction between blast and metal was reproduced by exchanging pressure and particle velocity at the coupled boundary. While pressure and particle velocity obtained by the one-way analysis was overestimated in the case of contact detonation, the two-way analysis achieved good agreement with the AUTODYN[○!R]. In the case of standoff detonation, the weak blast resulted only small difference in terminal particle velocity. However, the wave propagation in the target may result pressure rise at the coupled boundary, suggesting necessity of two-way calculation in any case of coupled analyses.4. Simulation of interaction between shock and water columnThe simulation ended before deformation due to the instability of the interaction. The formation of vortex, however, denoted qualitative reproduction of the experiment. By conducting numerical experiments by substituting the cylindrical column with a quadrangular column, the water deformation and the development of the vortex was confirmed to mutually progress these particular events Less

连续DEM(C-DEM)是通过引入连续介质力学的概念使偏应力得以再现而提出的。用C-DEM模拟了撞击问题、爆炸与金属的相互作用、冲击波与水柱的相互作用。通过将计算结果与理论计算结果、试验结果以及可靠的商业规范计算结果进行比较，验证了所提出的方法和程序的有效性。本研究的结论总结如下。建立了获得春季品系的连续DEM改进方法。这种在C-DEM中的实现使通常用于非连续分析的DEM可以应用基于连续介质力学计算的本构关系。此外，还通过应用人工粘度实现了分析结果的稳定化。冲击分析的C-DEM验证一维(1D)刚性墙撞击结果与理论…吻合较好更多的价值。金属的二维塑性变形定性地再现了实验结果。通过理论计算和另一种方法计算结果的比较，对一维冲击问题进行了计算。C-DEM和AUTODYN[0！R]在SUS 304飞行器与靶板的二维碰撞中表现出很好的一致性。一维爆炸与金属相互作用的模拟通过在耦合边界上交换压力和质点速度来再现爆炸与金属之间的相互作用。在接触爆轰情况下，单向分析得到的压力和质点速度被高估，而双向分析则与AUTODYN[0！R]有很好的一致性。在对峙爆轰的情况下，弱爆炸只会导致最终粒子速度的微小差异。然而，波在目标中的传播可能会导致耦合边界处的压力上升，这表明在任何情况下耦合分析都需要进行双向计算。激波与水柱相互作用的模拟由于相互作用的不稳定性，模拟在变形前结束。然而，漩涡的形成意味着实验的定性再现。通过用四边形圆柱体代替圆柱体进行数值实验，证实了水的变形和涡旋的发展对这些特殊事件的相互促进作用较小

项目成果

地形を含んだ広域空間における爆発被害に関する数値的予測

包括地形在内的大范围爆炸损伤的数值预测

• 发表时间: 2007
• 作者: H. Funakubo;H. Nakaki;R. Ikariyama;S. Yokoyama;Y.-K. Kim;K. Nishida;K. Saito;O. Sakata and S. Kimura;矢守克也;韮澤 貴之
• 通讯作者: 韮澤 貴之

Numerical Analysis on Blast-Structure Interaction using the Continuous-DEM

使用连续 DEM 进行爆炸与结构相互作用的数值分析

• 发表时间: 2007
• 作者: Tsukahara;Yoko
• 通讯作者: Yoko

個別要素法(DEM)によるコンクリート中の衝撃波伝播現象の数値解析

使用离散元法（DEM）对混凝土中冲击波传播现象进行数值分析

• 发表时间: 2007
• 作者: 牛山素行;矢守克也;篠木幹子;太田好乃;田中 克己
• 通讯作者: 田中 克己

Continuous-DEMを用いた爆風-構造連成解析

使用连续 DEM 进行爆炸结构相互作用分析

• 发表时间: 2007
• 作者: 塚原 陽子

個別要素法によるコンクリート壁への鉄塊衝突に関する数値解析

铁块与混凝土墙碰撞离散元数值分析

• 发表时间: 2007
• 作者: 矢守克也;牛山素行;塚原 陽子
• 通讯作者: 塚原 陽子