变形速度张量各分量在正交曲线坐标 $(g_1,g_2,g_3)$ 中的表达式用到拉梅系数 $H_1,H_2,H_3$，例如 $S_{11}=\frac{1}{H_1}\frac{\partial v_1}{\partial g_1}+\frac{v_2}{H_1H_2}\frac{\partial H_1}{\partial g_2}+\frac{v_3}{H_1H_3}\frac{\partial H_1}{\partial g_3}$，非对角线分量如 $2S_{12}=\frac{1}{H_2}\frac{\partial v_1}{\partial g_2}+\frac{1}{H_1}\frac{\partial v_2}{\partial g_1}-\frac{v_1}{H_1H_2}\frac{\partial H_1}{\partial g_2}-\frac{v_2}{H_1H_2}\frac{\partial H_2}{\partial g_1}$。

出处：84