Dynamic analysis of mechanisms with finite elements method

In this study, crank-coupler mechanisms with elastic coupler are investigated mainly in three bar mechanisms. First of all, velocity and acceleration equations are obtained by using the displacement which occurs as a result of deformation that occurs from elasticity of coupler in mechanism transaction. Lagrange equations are used to obtain stiffness and mass matrices. After obtaining these equations theorically, three bar mechanism and hammer-bar mechanism are analysed by using ADAMS software. Under effects of the variation of bar length and head mass, mode shapes, natural frequencies and stresses are investigated.In conclusion, during the investigation of hammer-bar mechanism, analysis is made by changing follower lengths and hammer masses and occuring differences are compared.