en موتور احتراق داخلی Internal Combustion Engines (ICE, ...) پژوهشي Research <p class="Abstract" style="margin: 0in 0in 10pt;"><font size="2"><font color="#000000"><font face="Times New Roman">In the present paper, the modal analysis on a full finite element model of an off-road vehicle. This vehicle was modeled in the CATIA software and then meshed in the HYPERMESH software. The free vibration analysis was conducted by the ABAQUS software. By applying an external displacement, the forced vibration analysis was also performed. As a result, natural frequencies and shape modes were extracted to detect critical regions. Then, some improvements were suggested to have better vibration behavior of the vehicle.<!--stripped--><!--stripped--></font></font></font></p> free vibration, forced vibration, modal analysis, finite element model, off-road vehicle 2028 2033 http://ase.iust.ac.ir/browse.php?a_code=A-10-63-110&slc_lang=en&sid=1 R. Hosseini 180031947532846001262 180031947532846001262 Yes M. Azadi 180031947532846001263 180031947532846001263 No .M Sadeghi Hegar 180031947532846001264 180031947532846001264 No .Y Pournaghi 180031947532846001265 180031947532846001265 No .M Shariyat 180031947532846001266 180031947532846001266 No