中文说明：此程序将杆结构和管结构的频散曲线求解集成到一起，只需要改变结构的内外半径尺寸就可以求得上述两种结构的频散曲线，例如当取内半径a=0,外半径b=c，则是杆结构的频散曲线；当内半径a=c,外半径b=d时，此时求得是内外半径分别为a,b的管结构的频散曲线，非常方便快捷。
English Description：
This program will rod structure and tube structure of frequency bulk curve solution integrated to together, just to change structure of both inside and outside radius size on can obtained above two species structure of frequency bulk curve, such as Dang take within RADIUS a=0, outside RADIUS b=c, is is rod structure of frequency bulk curve; Dang within RADIUS a=c, outside RADIUS b=d Shi, at obtained is both inside and outside RADIUS respectively for a,b of tube structure of frequency bulk curve, very convenient shortcut.