Pyramidal dot matrix scatterer inclusion-type underwater sound absorption structure
A lattice structure and scatterer technology, which is applied in the direction of sound-producing equipment and instruments to achieve the effects of excellent mechanical properties, simple structure and easy manufacture.
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[0051] Example 1
[0052] The thickness of the panel is 1.5mm, the thickness of the damping layer is 30mm, the Young's modulus of the damping layer material is 6MPa, the radius of the lattice inclined rod is 1.5mm, the material of the embedded scatterer is lead, the diameter of the embedded scatterer is 5mm, and the distance between the embedded scatterer is 1.5mm. The distance between the panels is 0.01mm.
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[0053] Example 2
[0054] The thickness of the panel is 2mm, the thickness of the damping layer is 42mm, the Young's modulus of the damping layer material is 10MPa, the radius of the lattice inclined rod is 2mm, the material of the embedded scatterer is iron, the diameter of the embedded scatterer is 10mm, and the distance from the top of the embedded scatterer is above The distance between the panels is 0.1mm.
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[0055] Example 3
[0056] The thickness of the panel is 2.5mm, the thickness of the damping layer is 40.83mm, the Young's modulus of the damping layer material is 15MPa, the radius of the lattice inclined rod is 2.5mm, the material of the embedded diffuser is aluminum, the diameter of the embedded diffuser is 7mm, and the embedded diffuser is the most The distance between the top and the top panel is 1mm.
[0057] see figure 2 , the compressive load borne by the present invention has a linear relationship with the equivalent strain, that is, the slope of the curve corresponds to the equivalent compressive modulus of the structure. After calculation, we can get:
[0058] The equivalent compressive modulus of Example 1 is 461MPa;
[0059] The equivalent compressive modulus of embodiment 2 is 523MPa;
[0060] The equivalent compressive modulus of Example 3 was 797 MPa.
[0061] Theoretically, the inclined rod is the most important bearing component in the lattice structure,...
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