| Summary: | 碩士 === 國立交通大學 === 機械工程系所 === 103 === In this thesis, the steady state responses of drill system are analyzed by a modified transfer matrix method. The transfer matrix method is modified in this thesis by representing the transfer matrix of the shaft by continuous systems instead of lumped systems. And the five degrees of freedom model are used in performing dynamic analysis of drill system. Therefore, the accuracy of system is improved.
In this thesis, the drill consist of the cylinder, conical beam and flute. For realistic,the drill is modeled by the Timoshenko beam. The dynamic equations of the drill system is derived from Hamilton’s Principle. And the process of derving transfer matrix is relatived to Harmonic Balance Method. The drill system is affected by each other when the system is under the unbalance force, the axial force, and the cutting torque. Final, we have written a program to do numerical analysis about modified transfer matrix.
|
|---|
