轴对称薄壁结构自由振动的边界元分析1)

周琪, 陈永强

FREE VIBRATION ANALYSIS OF THIN-WALLED AXISYMMETRIC STRUCTURES WITH BOUNDARY ELEMENT METHOD1)

Zhou Qi,Chen Yongqiang

表2 环向波数w = 0常规圆筒前五阶反对称频率(M = 25)

Table 2 The first 5 anti-symmetrical frequency of the general hollow cylinder with n = 0 (N = 25)

Order NB = 8 NB = 16 NB = 32 fem[31] ssr[32] Relative error /10-3 1 1.053 79 1.051 43 1.051 41 1.0529 1.0522 0.75 2 3.190 02 3.130 20 3.126 04 3.1339 3.1296 1.10 3 3.987 52 3.956 86 3.954 27 3.968 0 3.953 1 0.29 4 5.784 93 5.712 80 5.707 17 5.711 5 5.689 3 3.10 5 6.276 04 5.868 76 5.832 29 — — —