A New Experimental Method for the Nonlinear Modal Parameter Identification of a Pressurized Water Reactor Fuel Assembly

<div>Summary of the 1st-order modal parameters versus amplitude relationships obtained by the LogDec and POD (svd) methods. (a) Natural frequency. (b) Damping ratio.</div>

Science and Technology of Nuclear Installations

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Figure 20

Figure 20: A New Experimental Method for the Nonlinear Modal Parameter Identification of a Pressurized Water Reactor Fuel Assembly 