The topic is Design of the Headlight Module Frame
the point is to design the frame with as high ratio stiffness/volume as possible. The frame must meet other conditions such as minimal natural frequency of the frame (110 Hz) etc.
I took part in the competition as everybode else in the course since it's at the same time our semestral project. I will see what can I think out.. (update 01/22/09 - see the results below)
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| From Pavel's blog |
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| From Pavel's blog |
A bit theory about the solution
Basic knowledge of mechanical vibrations comes handy here. The task is to design a frame for the light projector with as minimal volume as possible. There were other requisitions that needed to be fulfilled. Max. volume and minimal first frequency (110) of the system. I mention those 2 because they are linked.
Basic knowledge of mechanical virbations says the closer is mass the higher is frequency. This fully applies here. Surely frequency is also determined by stiffness, in this case by shape stiffness (material was set), but the distance plays its role. Therefore mass of the model should be put as close to the center of mass, within the max. volume area as possible.
The results
Even this project was kind of modelin and one would think material analysis and vibration knowledge would help a lot in fact it did help just a bit. I find this project more about guessing,trying and experience rather than about theoretical knowledge of the problem although the theory helps in start.
The number of iteration was vital. I didn't spend as much time as some others. As I was told by the teacher the best ones made about 30 different designs while I did about 5.
The results: I ended at 8th place in this minor competition.
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| From Pavel's blog |
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| From Pavel's blog |
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