 respons plate decai convect randon pressur field respons plate decai convect randon pressur field method lyon analysi vibratori respons plate random pressur field pressur correl random field assum scale small compar plate size decai exponenti convect constant speed plate case consid convect speed speed free flexur wave plate convect speed order flexur wave speed squar plate displac independ convect speed flexur wave speed increas speed order flexur wave speed damp effect vibrat reduct case convect speed smaller flexur speed hysteret damp reduct displac respons limit decai assum random pressur field 