Postgraduate, School of Naval Architecture and Maritime, Zhejiang Ocean University
1. Dynamic modelling of an elastic pendulum using 3-DOF Nodal Position Finite Element Method (2020.02~2020.06)
At the first beginning, I preliminary learn the finite element method by G. Q. Li. (2015), in which the 3-DOF Nodal Position FEM was used to model the motion of a tether spacecraft. Based on the mastering of numerical algorithms, a FORTRAN based program was developed.
The oscillation of an elastic pendulum was investigated in this program. First, the simple pendulum motion with an initial velocity at the free end was tested. Then, the results of free-falling elastic pendulum was carried out. The results are shown as follows.
P.s. : The detailed expressions and matrixes can be seen in G. Q. Li. (2015) (Long-term dynamic modeling of tethered spacecraft using nodal position finite element method and symplectic integration)