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

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