# Search results

1. ### Unconstrained Modal Analysis

I am not sure about the assumption that the wheels are "bounded" to the ground by the weight of the structure... Should I constraint also the positive z-direction on those nodes corresponding to the link to wheels because of the weight? Weight affects to all nodes of the structure, so...
2. ### Vibration of a bicycle frame

However, I am not sure about the assumption that the wheels are "bounded" to the ground by the weight of the bike... Should I constraint also the positive z-direction on those nodes corresponding to the link to wheels because of the weight? But weight affects to all nodes of the structure...
3. ### Unconstrained Modal Analysis

Ok! Thank you very much!
4. ### Vibration of a bicycle frame

Ok! Thank you very much!
5. ### Unconstrained Modal Analysis

Hi, I have the same doubt about unconstrained modal analysis. I do not know exactly why it is useful for. I do not know how to get some insight into where are the best constraint locations from the unconstrained analysis. Related to it, if I had to perform a modal analysis of a box-like...
6. ### Modal Analysis

Hi, I am not sure about the performance of free-free modal analysis in ANSYS. If I wanted to get the natural frequencies of a box-like structure with four wheels (at each corner of the bottom surface) by means of FE-analysis, should it be performed as constrained or unconstrained ? Indeed...
7. ### Modal analysis

Hi, If I wanted to get the natural frequencies of a box-like structure with four wheels (at each corner of the bottom surface) by means of FE-analysis, should it be performed as constrained or unconstrained ? Indeed, the wheels are not bounded to the ground, so please, could you help me? Thank...
8. ### Vibration of a bicycle frame

Hi, If I wanted to get the natural frequencies of the bicycle frame by means of FE-analysis, should it be performed as constrained or unconstrained ? Indeed, the wheels are not bounded to the ground, so please, could you help me? Thank you very much
9. ### Need an help in Modal Analysis

Hi, Why did you perform a free-free modal analysis? Why it is useful for? I mean, you should always have into account the constraints, shouldn't you?