أرسل هذا في رسالة قصيرة: Dynamic response of a cracked beam subject to a moving load

 _____     __   __    _____      ___      _  _   
|  __ \\   \ \\/ //  / ____||   / _ \\   | \| || 
| |  \ ||   \ ` //  / //---`'  | / \ ||  |  ' || 
| |__/ ||    | ||   \ \\___    | \_/ ||  | .  || 
|_____//     |_||    \_____||   \___//   |_|\_|| 
 -----`      `-`'     `----`    `---`    `-` -`