CAJ | 학술논문

为了研究物性相同的相邻磁化磁体进行磁场等效拟合为单磁体的合理性，基于圆环电流理论磁体单元建立了相邻磁化磁体磁场计算模型；通过计算相邻磁体空间球面上的磁场，以等效磁场模量绝对误差最小建立了单磁体物性参数等效拟合反演目标函数，使用遗传模式搜索算法进行了反演参数求解。研究结果表明：拟合单磁体与原相邻磁化磁体单元的磁远场分布一致，磁场等效拟合磁通密度模相对误差随拟合球面半径增大而减小，同一球面上相对误差随外磁场夹角增大而先增大后减小，相对误差与材料磁各向异性及单元绝对边长无关。研究结果论证了磁化磁体单元磁场等效合并的合理性，能够为隐蔽性铁磁体所致磁异常数值模拟单元合并提供理论依据与误差评价准则。
위료연구물성상동적상린자화자체진행자장등효의합위단자체적합이성，기우원배전류이론자체단원건립료상린자화자체자장계산모형；통과계산상린자체공간구면상적자장，이등효자장모량절대오차최소건립료단자체물성삼수등효의합반연목표함수，사용유전모식수색산법진행료반연삼수구해。연구결과표명：의합단자체여원상린자화자체단원적자원장분포일치，자장등효의합자통밀도모상대오차수의합구면반경증대이감소，동일구면상상대오차수외자장협각증대이선증대후감소，상대오차여재료자각향이성급단원절대변장무관。연구결과론증료자화자체단원자장등효합병적합이성，능구위은폐성철자체소치자이상수치모의단원합병제공이론의거여오차평개준칙。
To verify the rationality of the magnetic field equivalent of adjacent magnets which have the same properties as a single magnet ,a calculation model for the magnetic field of adjacent magnetized magnets is established based on the theory of circular-current magnet .The objective function is deter-mined according to the minimum absolute modulus error between the magnetic field of adjacent mag -netized magnets and that of equivalent single magnet at identical points .The genetic pattern search al-gorithm is used to obtain the inversion parameters .The results show that the long-distance magnetic field of the fitting single-magnet is identical to that of adjacent magnets ,the relative error of magnetic flux density modulus decreases as the spherical radius increases ,and the relative error of the same sphere initially increases and then decreases with an increase in field angle .Furthermore ,the relative error has no relation with the magnetic anisotropy and the absolute length of magnet unit .Studies ve-rify the rationality of combined magnetic field calculation ,which can provide a theoretical basis for merging units and an evaluation criterion for fitting error estimates as far as the numerical simulation of magnetic anomaly induced by latent ferromagnetic objects is concerned .