I need to set up Shock vibration analysis for electronic devices based on following military standards,
In this statement i am confused with meaning of 3 shock/ direction i.e. total 18 shocks and similarly 2 shock/ direction i.e total 12 shocks.
Can anyone tell me what does this number shock per direction mean..?? And how do we take these numbers of shocks into account Simulation set up?.
Thanks in advance.
Regards,
Shreeshial
Thank you for your information.
but how to define these three shock per direction in our simulation set up. In general we take half sine or saw tooth as shock pulse in shock analysis but i am not getting how do we consider the number of shocks per direction in an analysis set up.
Shreeshial Biradar wrote:
Thank you for your information.
but how to define these three shock per direction in our simulation set up. In general we take half sine or saw tooth as shock pulse in shock analysis but i am not getting how do we consider the number of shocks per direction in an analysis set up.
I have no idea how you would do it in a simulation. But if I where to do this in a real life test stand I would smack it to one direction in which it will see shock in operation three times and then to the opposite direction. That's how I would set up the simulation. I'm no simulation expert so can't answer exactly how'd you do that.
To me simulations should match real world as closely as possible. How is this thing going to be used in the real world and how is it going to see shock...that's what your simulation should look like.
Thank you once again.
Is it something similar to repetitive application of load ,testing for fatigue life of product ??
I would assume shock/direction means number of shocks in each direction. IE you would do three shocks one direction, three shocks the other direction, rinse and repeat.
That being said it's a MIL spec and it's probably more clearly spelled out somewhere else as generally little in a MIL spec is left up to interpretation.