Abstarct: In this thesis, dynamic analysis of elastic problems in two dimensions has been done by isogeometric method. In fact, at the first step required equations is generated to earn the mass matrix. Also the finite element method is compared with isogeometric method.Moreover the effect of increase the control points and spline curve degree on answers improving has been detected. Considering that dynamic analysis is used in Newmark method, the effect of changing the parameters α and γ is compared with denoted methods.