Numerical simulation analysis method for loudspeaker falling process

Abstract

The invention provides a numerical simulation analysis method for a loudspeaker falling process. The method comprises the steps of firstly building a finite element simulation model: 1) building a falling simulation geometric model containing a loudspeaker individual and concrete poured bricks; 2) setting a material model, a contact boundary condition, an initial condition, a constraint condition and a load force in a solid mechanics physical field; 3) setting material parameters; and 4) setting grid type and size, and performing grid division to generate the finite element model; and secondly solving the finite element model by adopting a transient analysis method, and performing post-processing to obtain change relationships of energy, stress, strain and displacement in the loudspeaker falling process, wherein the change relationships specifically include 1) the change relationship of total kinetic energy and total elastic strain energy of the loudspeaker along with time, 2) a distribution diagram of stress on a loudspeaker structure at a specified moment, 3) a displacement of a mass point on the loudspeaker structure at the specified moment, and 4) plastic strain capacity and distribution diagram of the loudspeaker.

Description

Technical field [0001] The invention belongs to the field of loudspeakers, and relates to a simulation analysis method of loudspeaker structural mechanics and nonlinear dynamics. This method can be used to simulate the drop test of the loudspeaker. Through transient analysis, the stress, strain and displacement of any point on the structure of the loudspeaker can be obtained at any time during the whole drop and impact process. This method can be used to estimate the ability of the loudspeaker to resist impact when accidentally falling off during actual transportation, installation and work, and then to judge the stability of the loudspeaker structure. Background technique [0002] Sufficient structural stability of the speaker is a prerequisite to ensure its normal operation, and structural damage will affect the listening quality and service life of the speaker. The loudspeaker drop test is one of the common ways to test the structural stability of the loudspeaker. After the l...

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Problems solved by technology

[0004] The main problems solved by the present invention are: 1) the drop test must be carried out after the loudspeaker sample is produced, and repeated sample copying is required in the research and development process, which has the problems of long time consumption and high cost; 2) trial production of samples requires professional mold opening Machines have high requirements on the hardware of the R&D environment; 3) The drop test can only obtain the results after impact, and cannot accurately analyze the spatial distribution of stress, strain and displacement during the impact process and their changes over time

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