研究揭示经典的球面波波动方程只对固定振幅相成立，即只描述了相的运动方程，其波速为相速度。
The studying results show that the classical elastic wave equation of spherical wave is only true for fixed amplitude phase and described only kinematic equation of phase velocity.
在变换后的球面域上用球谐函数来拟合速度函数，达到降低球谐系数阶数的目的。
Representing velocities by spherical harmonic expansion on the sphere after transformation can greatly reduce the number of spherical harmonic coefficients needed.
通过模拟比较，揭示了进给速度和轧制比对双球面环件轧制宽展变形与力能参数的作用规律。
Through simulation and comparison, the influence laws of feed velocity and different rolling ratio on transverse width deformation and force-energy parameters were opened out.
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