發送短信 : The transient response of a two-layered elastic cylindrical shell impinged by an underwater shock wave

  _____     ______    ______    ______    ______  
 |__  //   /_   _//  /_   _//  /_   _//  /_   _// 
   / //     -| ||-     | ||     -| ||-     | ||   
  / //__    _| ||_    _| ||     _| ||_    _| ||   
 /_____||  /_____//  /__//     /_____//  /__//    
 `-----`   `-----`   `--`      `-----`   `--`