Wingside Tank side Figure 6: Instrumentation of the rear attachment of the right wing. −1 −0.5 0 0.5 1 x 10−3 −0.1 0 0.1 −100 −50 0 50 100 −1 −0.5 0 0.5 1 x 10−3 −100 −50 0 50 100 −1 −0.5 0 0.5 1 x 10−3 −0.1 0 0.1 −100 −50 0 50 100 −1 −0.5 0 0.5 1 x 10−3 −100 −50 0 50 100 ˙xrel xrel ¨x xrel ¨x ˙xrel xrel ¨x xrel ¨x Figure 7: Estimated restoring force in the connections between tanks and wings. Left plots: measured acceleration in terms of the relative displacement (m) and velocity (m/s). Right plots: stiffness curve given by the measured acceleration for zero velocity. Top plots: rear tank connection of the left wing. Bottom plots: rear tank connection of the right wing. 234
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