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Sensitivity computations in higher order continuation methods

机译:高阶连续法中的灵敏度计算

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Sensitivity analysis is a key tool in the study of the relationships between the input parameters of a model and the output solution. Although sensitivity analysis is extensively addressed in the literature, little attention has been brought to the methodological aspects of the sensitivity of nonlinear parametric solutions computed through a continuation technique. This paper proposes four combinations of sensitivity analysis with continuation and homo-topy methods, including sensitivity analysis along solution branches or at a particular point. Theoretical aspects are discussed in the higher order continuation framework Diamant. The sensitivity methods are applied to a thermal ignition problem and some free vibration problems. Remarkable eigenvalue maps are produced for the complex nonlinear eigenvalue problems.
机译:灵敏度分析是研究模型输入参数与输出解决方案之间关系的关键工具。尽管敏感性分析在文献中得到了广泛的解决,但很少有人关注通过连续技术计算的非线性参数解的敏感性的方法论方面。本文提出了将敏感性分析与连续方法和同构拓扑方法进行四种组合的方法,包括沿溶液分支或特定点的敏感性分析。在高阶连续框架Diamant中讨论了理论方面。敏感性方法适用于热点火问题和一些自由振动问题。针对复杂的非线性特征值问题生成了显着的特征值图。

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