Aircraft Wing Case

Problem

  1. Model-test mismatch
  2. Inability to certify

Impact

  1. High test/model cost
  2. Product launch delay

Root cause

The anti-ice system is composed of a tube through which a hot fluid circulates and allows to prevent ice formation on the wing leading edge. When cold, the tube shrinks creating some free-play with its support, leading to nonlinear vibrations.

Solution

Proper identification of the nonlinear connection and creation of a nonlinear model allowed to properly represent the dynamics of the structure.

Benefits

Model validation is achieved. Product development can continue without further delay.

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