涡流

A new approach based on operator decomposition method has been developed to solve nonlinear Helmholtz equation.The approach is applied to compute the magnetic field and eddy current in nonlinear ferromagnetic materials and it provides an analytical solution.

根据算子分裂法的基本思想提出了一种有效的求解非线性亥姆霍兹方程的逼近解析法，对非线性铁磁材料中的磁场和涡流进行了求解，获得了级数形式的解析解。

Results show that there are different optimum swirls in different ranges of diesel engine operating condition.

试验结果表明，发动机在高、低速区的最佳进气涡流强度是不同的。

Using the domain derivative of the far-field pattern for eddy-current inverse problem with Dirichlet boundary condition,a new algorithm to recover the shape of cracks was constructed and some numerical examples were given.

运用Dirichlet边界条件下涡流检测反演的远场区域导数，构造了反演缺陷形状的一种新算法，并且给出了二维及三维的算例，数值反演的结果与实际缺陷吻合得较好。

In chapter three, the working principle and the loading characteristic of current eddy dynamometer are summarized.

第三章概述AMT试验台的加载装置—电涡流测功器的工作原理和加载特性。

It has a period of about 6~11 min. The vortices have a scale of about 5000 km×1400 km, and move earthward at the speed of 15~25 km/s.

所有5个涡流的旋转方向都为顺时针方向，旋转周期约为6~11 min。

In chapter 5, the dynamic vertical end effect of linear motor is analyzed, which causes eddy current loss and air gap flux decrease.

第五章针对直线电机特有的边缘效应，分析了动态纵向边缘效应的影响，它产生端部涡流损耗，减小气隙磁场。

The results showed that SiO2 induces the abnormal grain growth and increases the eddy current loss,also increases power loss.

结果显示晶粒随SiO2含量增加而变大，而且有局部的晶粒成长，晶粒变大进一步会影响晶界电阻，使的涡流损失增加，导致功率损失也跟著变大。

The magnetic drag moment and eddy current loss are investigated.

永磁磁浮轴承的损耗主要包括磁阻力矩损耗和涡流损耗。

Shielding must be a set of materials with good mechanical properties and corrosion resistance of the non-magnetic material, in order to reduce the eddy current loss coefficient of resistance to a large selection of materials.

屏蔽套材料必须是具有良好的机械性能和抗腐蚀性能的非导磁材料，为了减小涡流损耗要选用电阻系数大的材料。

Simulation results indicate that temperature rise in magnets becomes substantially large owing to a highlevel increase of eddy current loss due to the influence of carrier harmonics.

仿真结果表明，由于载波谐波的影响导致永磁体中涡流损耗的大量增加，其温升也非常显著。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。