أرسل هذا في رسالة قصيرة: A simplified weak coupling dynamic analysis method for running safety evaluation of train on bridges under earthquake excitation

             ___    __    __     ___      _____   
    ___     / _ \\  \ \\ / //   / _ \\   /  ___|| 
   /   ||  / //\ \\  \ \/ //   | / \ || | // __   
  | [] || |  ___  ||  \  //    | \_/ || | \\_\ || 
   \__ || |_||  |_||   \//      \___//   \____//  
    -|_|| `-`   `-`     `       `---`     `---`   
     `-`