Research on uncertainty of underwater pressure ring ribbed cylindrical shell strength test
In this paper,based on the law of uncertainty expansion,the uncertainty analysis of the strength test results of underwater pressure ring rib cylindrical shell is studied,and a set of uncertainty analysis method suitable for underwater pressure structure strength test is established.The confidence interval of typical position stress of annular ribbed cylindrical shell under certain confidence level is given.The results show that the uncertainty caused by data measurement and Young's modulus is the largest for the stress in the typical position of the circular rib-cylindrical shell model with fine turning,while the uncertainty caused by plate thickness and initial deflection is relatively small.The results of this paper have reference sig-nificance for improving the test technique and test accuracy of underwater compressive structure strength.
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