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KMID : 0371819980300040287
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Nuclear Engineering and Technology
1998 Volume.30 No. 4 p.287 ~ p.297
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Verification and Sensitivity Analysis on the Elastic Stiffness of the Leaf Type Holddown Spring Assembly
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Song Kee-Nam
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Abstract
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The elastic stiffness formula of leaf type holddown spring(HDS) assembly-is verified by comparing the values of elastic stiffness with the characteristic test results of the HDS´s specimens. The comparisons show that the derived elastic stiffness formula is useful in reliably estimating the elastic stiffness of leaf type HDS assembly. The elastic stiffness sensitivity of leaf type HDS assembly is analyzed using the formula and its gradient vectors obtained from the mid-point formula. As a result of sensitivity analysis, the elastic stiffness sensitivity with respect to each design variable is quantified and design variables of large sensitivity are identified. Among the design variables, leaf thickness is identified as the most sensitive design variable to the elastic stiffness of leaf type HDS assembly. In addition, the elastic stiffness sensitivity, with respect to design variable, is in power-law type correlation to the base thickness of the leaf.
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