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 _____      _____     ______    ______    ______  
|  __ \\   |  ___||  /_____//  /_   _//  /_   _// 
| |  \ ||  | ||__    `____ `    -| ||-     | ||   
| |__/ ||  | ||__    /___//     _| ||_    _| ||   
|_____//   |_____||  `__ `     /_____//  /__//    
 -----`    `-----`   /_//      `-----`   `--`     
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發送短信 : Green's functions for Timoshenko beam problems