Originally Posted by
Stanger
I just went back and read them and do not see what you're talking about. I see a suspension test rig link. Am I missing something? Auto frames are tested in a fixed jig and I don't see why we wouldn't test a bike frame the same way. Decrease the independent variables and isolate the system to find out what we want to know.
The bottom of the "page 17" (page 2) scan on the cozybeehive link... "A comparison of Tables 1 and 2 shows that, as expected, the [sic] biker has a strong influence on the dynamics of a bike and almost all the modal parameters are modified. With a [groan] biker, there are only few modes that can be extracted within the 10-100Hz band. Most of the modes on the handlebars are not detectable. Only the first cantilever beam-like mode of the front fork and wheel is similar between the two configurations. The natural frequency of that mode is shifted from 33.5 Hz to 27.8 Hz with the presence of the cyclist."