| 1. | Thirdly , employing the boundary element method , the original problem ( having imperfect interface ) will be solved on the basis of elastic fields with perfect interface
然后，运用边界单元法得出原问题基于完美界面基础上的解答。 |
| 2. | Some good characteristics of bem are lost as a significant cost ; the contact boundary conditions can not be satisfied on whole boundary , even in the sense of discretization
付出的代价是丧失了边界元法原有的一些优良特性，接触边界条件在离散意义下也不能再在整个边界单元上精确满足。 |
| 3. | It shows that the accuracy of the virtual boundary element method is better than that of the boundary element method as the distance between virtual boundary and real boundary is optimum
对强流电子枪的计算表明，在同等条件下，取定最佳的虚实边界距离与边界单元数，虚边界元法较边界元法的精度要高。 |
| 4. | We extend this method to the problem of a domain which boundary is an open arc or an open segment . in this paper , we simulate the singularity of solution in extreme point of open arc or open segment by singular element
本文还把此方法推广到求解区域边界是直线段或者开弧段的情况，采用引入奇异边界单元的方法来模拟解在开边界端点附近的奇异性。 |
| 5. | Considering the interaction of overlapped shield tunneling , the boundary element method was applied to analyze the ground displacement distribution and interaction between two adjacent tunnels in three typical situations
摘要考虑盾构隧道叠交施工之间的相互影响，应用边界单元法对相邻隧道开挖过程中的三种典型叠交位置关系，引起的地层位移场分布规律及相互影响进行分析。 |
| 6. | The present thesis solves euler equations with quick parallel computing methods on grids . based on schwarz parallel algorithms , collectivity flow field numerical value solver can be gained via evaluating interface boundary cells by passing information
本文的主要目的是并行快速求解欧拉方程数值解，是以schwarz并行算法为理论依据，通过信息传递对内边界单元赋值，以得到总体流场的数值解。 |
| 7. | The " wavefront " domain decomposition method developed above is used in the division of flow field domain . the quantity of physics variables on the " subjunctive " boundary elements needs mutual communication of subdomains during the simulation
流场区域的划分采用改进的“波阵面”区域分裂算法， “虚拟”边界单元的物理量的计算由子区域之间相互通讯来完成，信息的发送方式采用“循环式”发送方式。 |
| 8. | Fem and bem is very adapted to predict the noise level in lower frequency , but they need to describe the geometry of structure detailedly which is wasting - time for many modes in system and high frequency , wide band and random variable
有限单元方法和边界单元方法可以较好地预示低频环境噪声，但需要较为详细地描述结构的几何特性。对于时间上是随机的宽带高频分量，结构中存在大量模态的情况有时是费时的。 |
| 9. | This thesis initiates a study about the thermal - hydraulic research for the target structure and optimization . investigating the target research work at home and abroad , we acquire their design gist and technological developing route in the according fields . comparing the numerical - calculational methodology of multi - physical such as finite difference method , boundary element method , disperse element method and finite element method , finite element method is the predominant methodology , we have appliance of this method to calculate fluid field thermal field and stress field
针对靶区的结构设计，开展热工水力学研究工作;调研国内外靶区的研究现状，了解靶区的设计依据、技术发展路线及发展趋势；调研多物理场的数值模拟方法-有限差分法、边界单元法、离散单元法、有限元方法等等，其中最有效地方法是有限元方法；简述有限元方法在流场、温度场、应力场计算中的具体应用。 |
| 10. | The concept of gemm ( geology - engineering - mechanic model ) has been proposed in this thesis . gemm is a parameterized model consisted of representative units , boundary units ( including natural boundary and artificial boundary ) , target parameters and key engineering information
提出了gemm模型的概念，将gemm模型定义为：由等价体单元、界面单元(包括天然边界单元和人工边界单元)以及各地质单元的目标参数构成的，包含有关键工程信息并可直接应用于分析判断和数值计算的参数化模型。 |
