CAJ | 학술논문

针对岩层中介电常数和磁导率随深度变化的情况，给出了水平磁偶极子源电磁场的频率域特征及相应的变化规律。采用Kong给出的汉克尔J0变换线性滤波器(241点)和汉克尔J1变换线性滤波器(241点)算法，选用若干个地电模型，讨论了介质的磁导率和介电常数变化时的水平磁偶极子电磁场响应特征。计算结果表明，磁场的Hx、Hy分量幅值基本没有受到磁导率变化的影响，而磁场Hz和电场Ex、Ey分量幅值却随着磁导率的增大而增大；当频率低于106Hz时，介电常数变化对电磁场幅值基本没有影响，但在频率高于107Hz时，介电常数变化对电磁场幅值受到不同程度的影响。
침대암층중개전상수화자도솔수심도변화적정황，급출료수평자우겁자원전자장적빈솔역특정급상응적변화규률。채용Kong급출적한극이J0변환선성려파기(241점)화한극이J1변환선성려파기(241점)산법，선용약간개지전모형，토론료개질적자도솔화개전상수변화시적수평자우겁자전자장향응특정。계산결과표명，자장적Hx、Hy분량폭치기본몰유수도자도솔변화적영향，이자장Hz화전장Ex、Ey분량폭치각수착자도솔적증대이증대；당빈솔저우106Hz시，개전상수변화대전자장폭치기본몰유영향，단재빈솔고우107Hz시，개전상수변화대전자장폭치수도불동정도적영향。
In allusion to the case that dielectric constant and magnetic permeability vary with the depth of rock stratum,the frequency feature and corresponding variation law of electromagnetic field of a horizontal magnetic- dipole source is introduced in this paper.Taking advantage of the algorithm of Hankel J0 transform linear filters (120 points)and Hankel J1 transform linear filters (140 points)suggested by Kong,the response characteristic of a horizontal magnetic-dipole source is discussed as media dielectric constant and magnetic permeability make changes in several geoelectric structures.The result indicates an absence of correlation between the amplitude of magnetic field component Hx 、Hy and magnetic permeability,while a positive correlation between Hz (Ex ,Ey )and magnetic permeability;moreover,the change of dielectric constant scarcely affects electro-magnetic field when the frequency is less than 10 6 Hz.Only when the frequency is higher than 10 7 Hz,the change of dielectric constant differently affect electromagnetic field.