查询词典 direct numerical method

In this paper,a 3-D numerical simulation model is proposed to simulate and analyze the 3-D flow characteristics of natural spawning sites of Acipenser Sinensis by using N-S and k-ε formulas,the volume of fluid method is also used to simulate the two phase flow,and the finite volume method is used to disperse the calculated area.

将水动力学N-S方程、k-ε紊流数值模型与计算水气两相流的方法VOF相结合，采用控制体积法离散计算区域，建立了葛洲坝下游中华鲟产卵场的三维流场模拟模型。

Moreover, if a method is algebraically stable, then the numerical solutions of this method can preserve the stability property of the analytic ones.

并且证明了如果一个方法是代数稳定的，则该方法的数值解保持解析解的渐近稳定性。

When bilaminated rock mass is numerical analyzed by conventional finite element method ,that the shortcomings produced is not only the huge modeling workload and maneuverability become more inefficient with layer numbers increasing; but also the method can't reflect the bending deformation of the layered material.

采用一般有限元对互层岩体进行数值分析研究时，要求的单元数量多、建模工作量大；并且难以反映层状岩体的弯曲变形特性。

This method is able to predict accurately the forced response of bladed disks in frequency domain, which is validated by numerical integration method in time domain.

该方法可准确预测叶盘系统在频域的受迫响应，其有效性用数值积分法进行了验证。

A mathematical model of optical axis fitting is put forward here. The model combines analytic method and numerical analysis method together with consideration of the actual decentration measurement.

提出一种光轴拟合的数学模型，该数学模型结合了解析方法和数值分析方法，考虑了中心偏测量的实际情况，在严格的数学模型基础上做了合理的简化。

By combining k-ε models with the wall function calculation method and using the SIMPLE method for programming,the flow field in exhaust facility ,which has a low pressure heater and pressure reducer and desuperheater in it,has been treated with three-dimensional numerical simulation and the velocity distribution of the flow field in exhaust facility is herewith obtained.

采用k-ε模型并结合壁面函数法，利用SIMPLE算法编程，对某具有内置式低压加热器和减温减压器的直接空冷汽轮机排汽装置的内部流场进行了三维数值模拟，得到了整个排汽装置内部流场的速度分布情况。

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。

For the convenience of numerical computation, a hydrid model of normal mode method and ray method is suggested which combines the advantages of both methods.

为了便于数值计算，论文结合简正波方法和射线方法的各自优点，提出了对远场噪声源的贡献采用简正波方法和对近源采用射线方法的混合模型。

In this paper,a three dimensional elastic plastic hydrodynamical numerical method and the code MEPH3D using this method which can be used on high speed impact problems are introduced.

介绍一种可用于高速碰撞问题数值模拟的三维弹塑性流体动力学数值计算方法，以及应用该方法研制的应用软件MEPH3D，并给出了一些高速碰撞问题的数值计算结果，计算结果表明该程序具有计算三维高速碰撞问题的能力。

By numerical modeling of liquefiable slope, it is validated that the coupled method can save computing time than the simple meshless method, and be able to achieve a reasonable accuracy.

通过对可液化边坡模型的数值模拟，验证了该方法比单纯的无网格方法节约计算时间，并能够达到合理的精度。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。