The Deformation Calculation And Test Study Of Anechoic Tile Under Hydrostatic Pressure

With the development of modern sound-absorbing materials, anechoic tiles as a newtype of submarine stealth equipment gradually mature, which is widely used by worldnavies. Anechoic tile material laid on the submarine surface, can absorb and consume thesonar issued by other radar and reduce active sonar to improve the hidden nature, but canalso weaken the internal noise and outward radiation and thus reduce the submarine targetstrength, but also inhibit the hull vibration and reduce submarine self-noise. All thesefunctions are achieved relying on the sound absorption characteristics of anechoic tilematerials and the particular shape of the cavity within the tile, anechoic tile materialdeformation will affect the sound absorption properties of the material, changing the shapeof the cavity in the tile, then the performance of anechoic tile will inevitably be affected.Therefore, it is necessary to in-depth study for the deformation of anechoic tile material.Confirming by experiment and simulation, this study analyzed the overall deformation ofthe rectangular rubber plate within cavities under the hydrostatic pressure.This study is divided into two parts, a simulation part of an experimental part. First,determine the constitutive model of rubber, modeling and simulation software on therubber sheet by software, and then using the sealed pressure water tank simulation theunderwater high-voltage environment, do the experiment a rubber plate under the pressurein the underwater, compared the experimental data and simulation results and analyzed.Details are as follows:(1) Simulation part: First, compared several major constitutive model of anechoic tilematerial (rubber), and analyzed the advantages, deficiencies and scope of application ofthese models, so that we determined the constitutive model for our simulation is theMooney-Rivlin model; next analyzed and derived the constitutive equation of theMooney-Rivlin model and the method of determining its material constants; thenmodeling the anechoic tile using ABAQUS software, and simulation the anechoic tiledeformation under hydrostatic pressure.(2) The experimental part: Placed the anechoic tile in sealed pressure water tank andplus pressure, the test system out of the water tank got the signals from the watertight pressure sensor underwater by the wire through the seal, and then collected and storage thetest data. After processing the Simulation results and experimental data, compare thedisplacement at the key points, and summarizes the deformation of the whole anechoictile.