地磁场在应力致磁畸变产生过程中的影响  

Influence of geomagnetic field on the formation of stress induced magnetic abnormalities

作　　者：黄松岭[1] 李路明[1] 王晓凤[1] 施克仁[1] 陈鈃[1] 

机构地区：[1]清华大学机械工程系,北京100084

出　　处：《清华大学学报（自然科学版）》2003年第2期208-210,共3页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(50001006)

摘　　要：学术界对地磁场在应力磁畸变产生过程中的作用存在不同的观点。为了研究地磁场在应力磁畸变产生过程中的作用,以10mm提离值测量了两个过盈装配在一起的圆环和圆销对比试样(对比试样分别在屏蔽地磁场和地磁环境中制成)表面的磁场。实验结果是在地磁环境中制成的试样表面磁场的幅度仅比屏蔽地磁条件下制成的试样表面磁场的幅度大0.85%,这说明在应力磁畸变产生过程中,地磁场几乎不起任何作用。The influence of the geomagnetic field on the formation of stress induced magnetic field abnormalities above ferromagnetic materials is still unknown. The effect of geomagnetic field on stress induced magnetic field abnormalities was studied by measuring the magnetic fields on the surfaces of two specimens produced by tightly fitting round pegs on rings with and without the geomagnetic field with a testing liftoff of 10 millimeters. The results showed that the mean amplitude of the magnetic field of the specimen produced in the geomagnetic field was 0.85% larger than when shielded from the geomagnetic field. Therefore, geomagnetic field has little effect on the formation of stress induced magnetic field abnormalities above the surface of a ferromagnetic material.

关 键 词：地磁场 应力致磁畸变 产生过程 磁场畸变 残余应力 地磁屏蔽 

分 类 号：P318.2[天文地球—固体地球物理学]