Hi,
I'm trying to model the effect of tension on the eigenfrequency, and I think I'm misunderstanding the use of boundary loads. I have a long and narrow bridge (fixed at both ends, free along the length). I would expect that adding a boundary load on either end of the bridge, in opposing directions, would essentially be like tensioning a string, which will cause the resonance frequency to increase. But I'm not seeing any change in resonance. Why not?
I've also tried anything else I could think of that might change the resonance - body loads, strain at either end, etc. Nothing effects the first fundamental resonance. Any ideas would be hugely appreciated!
Regards,
Jillian
I'm trying to model the effect of tension on the eigenfrequency, and I think I'm misunderstanding the use of boundary loads. I have a long and narrow bridge (fixed at both ends, free along the length). I would expect that adding a boundary load on either end of the bridge, in opposing directions, would essentially be like tensioning a string, which will cause the resonance frequency to increase. But I'm not seeing any change in resonance. Why not?
I've also tried anything else I could think of that might change the resonance - body loads, strain at either end, etc. Nothing effects the first fundamental resonance. Any ideas would be hugely appreciated!
Regards,
Jillian