Recent content by pierre.sabiy

Why should I closed the discussion "material for sealing"??

This is not a marine gearbox. This gearbox is placed on board the ship (is not below deck).

It's the gearbox that will be 24 hours (thus still) installed on board naval ships.

Hello, I would need help. Need help choosing the material for sealing: o-ring, shaft seal. They will use the equipment that will be installed on board a seagoing ship. The conditions are: - Resistant to seawater - Withstand temperatures of -32 ° to + 60 ° or -25 ° to + 60 ° - And chemical...

hi, can not someone help me? I will be grateful for any advice.

It is true, the fourth image above equations will not apply because we get a negative value. Then what next?

I edited fig. for better understanding. So the resulting equation is as follows?

So once again. Because I'm not even sure if I understand you. Mass is between two compression springs. Force is applied on the system about the size of 50G for 10ms. So the way it is right now?

Sorry, I do not understand what you wrote. You think this way?

video is obviously abbreviated, thus mass will move until it reaches equilibrium, the initial position. for example. friction

The springs are not permanently connected with the mass, see video Are the compression springs. Yes if the mass goes in one direction, a situation arises when one spring would not push the mass, and then vice versa, tells more about the video. I sorry for having not know good English.

Hi, I have a thought that I have a bad differential equation. I do not know how to start, how do I calculate such a system, see. my picture. Because if there were extension springs, it would be easy. However, if used compression springs, so that's then I do not calculate.

I want to simulate such a system in Simulink. It is a system of mass between two compression, spring preload. Springs are compressed length of 64 mm to 54 mm. Acts on mass shock 50G for 10ms. The coefficient of spring constant is changed depending on the position and direction of movement mass...