numerical approach toward calculation of vibration characteristics of the multi axles truck using lagrange method

initially, the first aim of the present study is to model 3-axle rigid truck by developing a code inmatlab. secondly, each equation should be drived by acquisition of lagrange approach. afterderiving equations successfully, validation is performed by some result which was mentioned inbohao li's master thesis. although the present approach is totally different from the approachthat boahao li used in his analysis but the deviation of the present results from that thesis onaverage is 7 percent which shows an acceptable accuracy in our current numerical approach. inthe present study 19 degree of freedoms is used for determining natural frequency and dominantmotions. by having dominant motion, it is possible to clarify which region is in endangering ofresonance. this paper presents a portion of the results that have been gathered and for watchingnew result in this field, it is recommended to read our future papers. solidworks cad softwareis also used to calculate mass properties of several components that used in our present study.