A study on the strength of a vessel for absorbing vibration

There is a vessel having a rubber for absorbing vibrations when monorail-car is drived. This vessel is submitted to the internal pressure by the rubber, so the stress occurs in it. We need to know this stress distribution. But the shape of vessel being complex, it is difficult to calculate this stress distribution. So first of all we measured the internal pressure of the vessel by the rubber, and obtained experimentaly the stress distribution by means of sticking the strain gauges on the vessel surface. We modify the shape of vessel simply, and calculate stress distribution for this shape. The calculated stress nearly equal the measured it. As result we obtained the following conclusion. If the vessel is subjected to maximum load 5.5 t as repeated, the thin vessel-seem to be dangerous, but the thick is safety. Maximum load 5.5 t which acts on the pushing bar, is overestimated than it actually does.