二维正交各向异性位势问题的高阶单元快速多极边界元法1)
李聪, 胡斌, 胡宗军, 牛忠荣

ANALYSIS OF 2-D ORTHOTROPIC POTENTIAL PROBLEMS USING FAST MULTIPOLE BOUNDARY ELEMENT METHOD WITH HIGHER ORDER ELEMENTS1)
Li Cong, Hu Bin, Hu Zongjun, Niu Zhongrong
图9 正交各向异性椭圆环闭域全域的位势和位势梯度云图($\delta =0.02)$
Fig.9 Distributions of potential and potential gradient of the orthotropic elliptic ring domain ($\delta =0.02)$