This table includes discussion summaries and lecture notes for the first 6 sessions. From session #7 on, class discussion focused on individual student projects.
| SES # |
SUMMARY |
NOTES |
| 1 |
Introduction
Discussion: Might the natural frequencies of karabiner gates and ropes match under certain circumstances that would cause the karabiner gate to be open during fall arrest? |
Summary of In-class Derivation (PDF) |
| 2 |
Open Questions in Rock Climbing |
Presentation (PDF) |
| 3 |
Discussion of karabiner-rope Coupling |
Summary of Discussion (PDF) |
| 4 |
Rope Behavior |
Presentation (PDF) |
| 5 |
Three student projects defined:
- Measurement of karabiner gate opening due to oscillation, both in-vitro (say glued to a speaker cone) and in-vivo (in a drop test).
- Modeling of the frequency matching between rope and karabiner gate oscillation.
- Rope middle marking. |
|
| 6 |
Measured the frequency of rope oscillation.
Measured the spring constant of a karabiner and came up with an estimate for the oscillation frequency of the gate (~25 Hz).
Marked nylon and tried to see if any changes were observable under a light microscope ~100x magnification. No changes were readily apparent. |
Rope Oscillation Experiment (PDF) |