查询词典 geometrical boundary condition

The relation between the length of plastic zone along the crack line and external load is established by the matching condition of the elastoplastic fields on the boundary.

利用脆断区长度和荷载之间的关系，从理论上分析了断续节理产生劈裂破坏的贯通机理，并且确定了断续节理岩体发生劈裂破坏的强度。

When the gas flux is constant, the ratio of reduced resistance is improved with the increase of the water stream velocity. However, the relationship between the gas flux and the ratio of reduced resistance is more complex. When the water stream velocity is constant, if the gas flux is small in contrast, the effectiveness of reduced resistance is not obvious. But when the gas flux increased, the jetted gas will form """"archform"""" which will augment the shape resistance. In this condition, resistance could not be reduced and could even be increased, if the gas flux continues to be increased. So that there needs setting a baffle called step, which introduces the jetted gas into the turbulence boundary layer. In this case, the shape resistance may be fairly great. Besides, the waterline of model has also some effect on the ratio of reduced resistance, which acts on the size of wave. If waterline is deep, the wave could not affect the deployment of microbubble layer, so there is almost no effect on ratio of reduced resistance. However, the wave would affect distributing of microbubble layer under the model so that the gas could leak out from the two sides of model and directly affect the ratio of reduce resistance if the waterline is very small. Whether installing the dashplate or not has also the great influence on the effectiveness the ratio of reduced resistance. From the results of experiment, conclusion is that adding dashplate will greatly improve the effectiveness of reduced resistance.

当喷气量一定时，水流速度增大，减阻率提高；喷气量与减阻率之间的关系比较复杂，速度一定时，如果喷气量较小，减阻效果就比较差，但当喷气量增大的话，喷射出的气体就会形成一个&拱度&，增加了船模的形状阻力，在这种情况下最好采取断阶喷气，把气体引入到湍流边界层中，在这种情况下，船模的形状阻力比较大；船模的吃水对减阻率也有一定的影响，主要表现在波浪大小上，如果吃水较深，波浪影响不到微气泡层的分布，对减阻率不会造成太大影响，如果吃水较浅，波浪就会影响到微气泡层在船模底部的覆盖情况，可能会有部分微气泡从船模两侧泄漏，这样就直接影响到了减阻效果；是否安装压浪板，对减阻率也有较大的影响，从试验结果可以看出，在船模尾部加设了压浪板时，减阻效果明显得到改善。

The core energy of a 60° shuffle set dislocation was investigated by an atomistic simulation method based on the Stillinger-Weber potential and periodic boundary condition.

本文使用Stillinger-Weber势函数和周期性边界条件，通过在原子尺度上的分子动力学计算研究了60°位错的位错心能量和运动情况。

It is concerned with the optimal design of cylindrical shell on minimax deflection and minimal compliancy with arbitrary axisymmetrical boundary conditions and radial pressure, under the condition of the volume being constant.

研究在任意轴对称边界条件下和任意轴对称分布载荷作用下体积保持常数的圆柱壳的两类优化设计问题：极小化圆柱壳的最大挠度和极小化圆柱壳的柔度。

In this paper, several traditional models for computing are introduced at first. Conferring probability theory, the load boundary condition of that collector is analyzed, the characteristic values of Tubesheet in different design reference periods are computed. Based on homogenization method, after lots of numerical experiments, the mechanical characteristic of Tubesheet controlled different structure parameters is studied, and an empiristic formulas that could simplify Tubesheet to stiffen plate is gained. Then, G-M method is employed and Tubesheet is simplified to a normal plate.

本文在总结传统计算方法的基础上，参考概率设计方法，分析了大型袋式除尘器的荷载边界条件，计算了不同设计基准期下的花板可变荷载标准值，结合均匀化方法，通过大量数值实验，得出了不同参数对花板受力性能的影响规律，并拟合了将花板简化为加劲板的经验公式，再参考正交异性板法，最终推导了花板简化为均匀平板的经验公式。

The paper is emphasis on how to simulate the boundary condition of the enrockment near the high steep bank slope.

本文就如何模拟高陡岸坡附近堆石体的边界条件展开工作。

Compared with the conventional analytic methods, the author studies the feasibility that the elastic bearing model is used to simulate the boundary constraint condition of the enrockment.

引入弹性边界模型，对比传统分析中对边界约束的处理，研究用弹性边界来模拟堆石体边界约束条件的可行性；选用规则典型的坝体，研究面板堆石坝的面板及堆石体的应力应变规律，特别是周边缝的变形规律；分别讨论了岸坡坡比、坝前水深、坝高、河床底宽等几何参数对弹簧系数取值的影响，确定弹簧系数的取值范围，给出了可用于实际工程计算的最佳取值范围；以松山面板堆石坝作为工程实例，验证弹性边界模型的实用性，并为工程建设提供了一定的参考。

Based on the cellular automaton made up of regular hexagon cells, the nearest neighbor type and periodic boundary condition, equiaxial microstructure as parent phase was obtained.

文章采用正六边形网格划分法、最近邻邻居关系以及周期性边界条件的元胞自动机方法，获得等轴的母相微观组织。

The force equilibrious equation and the approximate plastic conditions are set up,solved using the boundary condition and the strenth static coefficient σ/σs of fixed cycles short core when the tube is drawn so calculating the drawing force at every pass.

建立近似的力平衡方程，近似的塑性条件。应用边界条件联解上述方程，求出固定圆柱形短芯头拔管时的应力状态系数σ_拉/σ_S，以计算各道次的拔制力。

Sedimentary basin could be considered as a huge chemical reactor in the geodynamic framework that constrains boundary condition and environment of the basin as well as material/energy transfer with its environment.

沉积盆地实际上是地球动力学系统中一个巨大的动态化学反应器，其所处的地球动力学背景制约着它的边界条件、外部环境及其与外部环境的物质和能量交换。

The witness also told the jury at the Royal Courts of Justice in London that he saw a paparazzo fighting with a member of the public who was trying to stop him taking pictures in the minutes before the emergency services arrived.

他还告诉在伦敦皇家法庭的陪审团，在急救服务到来之前，他当时看见一个狗仔队正和一群阻止他拍照的人打架。

The entire N／C program on a tape is made up of an accumulation of these successive data blocks.

纸带上的整个数控程序由这些连续数据单元连接而成。