A　number　of　Suspen-Dome　structures　have　been　built,　but　there　is　some　difficulty　in　using　experimental　data　to　obtain　good　modal　parameters,　especially　modal　damping.　In　this　paper,　an　ANSYS　numerical　simulation　of　the　35.4m　span　Suspen-Dome　is　presented.　Firstly,　the　natural　vibration　characteristics　of　Suspen-Dome　and　dynamic　response　under　some　random　forces　were　obtained.　Then　the　results　of　the　numerical　simulation　established　that　60　modes　are　sufficient　for　a　reasonable　dynamic　model.　This　model　is　used　to　represent　the　Suspen-Dome　dynamic　behavior,　and　OKID　is　then　used　to　try　to　identify　a　model　from　simulated　data.　A　400　order　model　generated　from　OKID　is　shown　to　contain　the　60　modes　from　ANSYS　and　is　shown　to　give　good　predictions　of　the　dynamic　behavior　of　Suspen-Dome.　The　results　of　this　paper　can　confirm　that　it　can　be　a　very　efficient　tool　for　the　identification　of　models　of　Suspen-Dome　dynamics.