I. Introduction

II. Theoritical study of the system
        II.1 Description of the system
 II.2 The free oscillations
    II.3 The forced oscillations

III. Resolution of the problem and results
          III.1 Results of the free oscillations case
             III.2 Results of the forced oscillations case

IV.The Program
      IV.1 Structure of the program
 IV.2 The initial conditions

V.Conclusion

VI. References