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)|