Nonlinear coupling resonance unit and nonlinear acoustic meta-material cellular structure
A technology of nonlinear coupling and resonance unit, which is applied in the fields of aerospace, solid mechanics, vibration and noise control, metamaterials, and mechanical engineering to achieve the effect of compact structure and high-efficiency vibration suppression effect
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[0032] The following descriptions are only a few embodiments of the present invention, and are not intended to limit the present invention in any form. Any skilled person who is familiar with the profession can use the technical content disclosed above to make some The changes or modifications are equivalent to equivalent implementation cases, and all belong to the scope of the technical solution.
[0033] The strongly nonlinear coupling resonant unit and nonlinear acoustic metamaterial involved in the present invention can be specifically implemented through the following five steps.
[0034] Step 1: Determine the real force and equivalent strong nonlinear stiffness coefficient of the coupled resonance element
[0035] The vertical nonlinearity is realized by a piecewise nonlinear spring. During the movement process, the force F(x) on the vibrator varies with the displacement x as a piecewise function:
[0036]
[0037] Among them, k 1 is the linear spring stiffness; P i...
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