Thanks for the info. You said testing, what do you mean by that? Is it the same method that you put your UUT in a shaker table? FEA = Finite Element Analysis ?
Thanks again,
Mica
Does exist an other way to find the nature frequecy of my uut? What I mean is, if I have the naturel frequency of my uut, for example my uut has a naturel frequency of 20 Hz, so I can go to the truck's and train's PSD curves and compare at that frequency what are the values. Then if my uut is...
After a shaker table test, I will have a PSD profile of my equipment. With these data I will be able to compare with my PSD truck's curve. What should my equipment's curve look like to be not interaction with the truck's vibration? Should my equipment PSD curve below the PSD truck's curve...
Thanks for all the feedbacks. For the interpretation of the PSD curve, for example, at 10 Hz I read 0.0012 g^2/Hz. If my equipment has the same response, this means is bad?
Mica
Yes, but I just want to know what is the worst scenario. And also, which type of transportation is the worst for my equipment. I have several Acceleration Spectral Density transportation curves. I have to know the limitation of the equipment while transported with different transport.
Thanks,
Mica
So, if I do a shaker table test to my equipment. I will obtain an Acceleration Spectral Density curve then I compare to my Acceleration Spectral Density curve of the truck. With these two curves, I can compare which frequency to be avoid or truck transportation is to be avoid. Is it that what...
Hi,
I'm newbie in vibration field. How can you interpete PSD data? In other words, I have data of a PSD (g^2/Hz vs Hz)curve for a truck, how can I know or calculate the objet that I want to put in is safe (not damage by the truck's vibration)?
Thanks,
Mica
Hi,
I want to clarify an equation. The resistance is given by
R = rho * L /A, this is valided in a conductor. Can we use it to calculate for a dielectric material.
Thanks,
Mica
The protective structure can either fall with the object or stay in ground. I do not know, want is the best way to do? It does not matter for the damage of the protective structure. But, if we can find something which can return back to its original form is the best because I'm doing repetition...
Well, I'm saying that an objet with a mass of 100 kg which falls down and I want to find a material which able to absorbe all the energy which means that the object does not rebounce.
Mica
Hi,
I'm looking for a materail which its strain value is highest possible. I would like to find a material which able to absorber all the energy when an objet is falling down. The masse of the objet is about 100 kg and it falls from 0.6 m. Is it possible to calculate want is the thickness...
Thanks, I'm try to prepare a presentation to explain about what is an antenna so, the question is, if someone ask me what is the different between them. I have no answer, so that why I'am sking this.
Mica
Thanks, Yes, sorry for misunderstand of the question. The question is the installations of the transmitting and receiving antenna. This is the question that I want to ask.
Thanks again,
Mica
Thanks, I want to know is if I see this equipement this is a transmitting antenna and vise versa. What do you mean by transmit antenna may have more " health & safety " requirements ?
Mica
Hi,
Q. What is the set up for a transmitting antenna and the set up for a receiving antenna ? I know the proprities of a transmitting or a receiving antenna are the same but what is the different between an operating mode and a receiving mode?
Thanks,
Mica
Is it possible to have analytical? I don't need to resolve it but just present the complet formula. The purpose of this is to introduce the NEC. I want to explain that analytical is hard to resolve so, we can resolve by numerical. So, why I need the formula.
Thanks for your help,
Mica
Hi,
If I have a dipole (horizotal or vertical), the radiation pattern is independant in phi angle but if my dipole is in a direction (i,j,k), this will dependant on phi angle? If so, what is the complet formula for this?
Thanks,
Mica
