Mohanlal0488
Structural
- Jun 26, 2020
- 103
Hi Guys
Please refer to the attached images.
The PSD has been developed using initial conditions on the "theta" coordinate for a coupled spring pendulum
the natural frequency of the spring system is 2.72Hz and of the pendulum motion is 1.36Hz. The parameters are sized such that parametric resonance exists.
I am struggling to interpret the PSD results. The natural frequencies of the springs and pendulum have extremely small amounts of energy. There seems to be harmonics arising in all the results. What would be the cause of such results?
I assume that the results are harmonics of the natural frequencies, which occur due to the unstable behavior of the system. However how would one interpret the results further? and why do they have more energy compared to the natural frequencies?
Please refer to the attached images.
The PSD has been developed using initial conditions on the "theta" coordinate for a coupled spring pendulum
the natural frequency of the spring system is 2.72Hz and of the pendulum motion is 1.36Hz. The parameters are sized such that parametric resonance exists.
I am struggling to interpret the PSD results. The natural frequencies of the springs and pendulum have extremely small amounts of energy. There seems to be harmonics arising in all the results. What would be the cause of such results?
I assume that the results are harmonics of the natural frequencies, which occur due to the unstable behavior of the system. However how would one interpret the results further? and why do they have more energy compared to the natural frequencies?
