Abstract
Most satellite launch vehicles uses flex seal as thrust vector control mechanism to enter safely into the required orbit. Flex seal contains alternative layers of elastomer pads and shims.It will experience different types of loads when rocket launched from the ground. In the present work pre-stressed modal analysis was done to analyze the response of the flex sealsubjected to maximum extended operating pressure by using finite element simulation software Ansys workbench. Non-linear 3D analysis was carried out by varying the number of shims, shim percentage and shim materials. It is observed that there is no considerable change in the frequencies as the numbers of shims are increasing, but there was a change in the frequency with the shim percentage.
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