修正的贝塞尔函数怎么处理What about the modified Bessel function

在使用解析法求解电机的三维模型，编写程序时需要用到修正的贝塞尔函数，问题是在贝塞尔函数的自变量和阶数变化时函数值变化很大，导致最后求出来的气隙磁密非常大（如图），有没有hxd有相关的经验办法

In the use of analytical method to solve the three-dimensional model of the motor, the program needs to use the modified Bessel function, the problem is that when the independent variable and order of the Bessel function changes, the function value changes greatly, resulting in the final obtained air gap magnetic density is very large (see figure), there is no relevant empirical method, heavy help