Impedance composite silencer three-dimensional modeling method
An impedance composite, three-dimensional modeling technology, applied in special data processing applications, design optimization/simulation, internal combustion piston engines, etc., can solve problems such as deviation, and achieve the effect of fast calculation, fast calculation speed, and high modeling accuracy
Active Publication Date: 2021-10-26
NINGBO UNIV
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Problems solved by technology
However, most of the existing analytical modeling methods simplify the impedance composite muffler to a two-dimensional structure for analysis. When the impedance composite muffler contains an asymmetric structure or asymmetric boundary, the results obtained by the modeling solution often have a large deviation from the actual one.
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[0109] Example: figure 1 As shown, a method of impeding the composite muffler three-dimensional modeling, the impedance composite muffler includes a cylindrical inlet tube 1, a cylindrical expansion chamber 2, a cylindrical outlet tube 3, and a perforated plate 4, cylindrical inlet tube 1 is expanded from cylindrical The front end of the cavity 2 is inserted into the cylindrical expanded chamber 2, and the cylindrical outlet tube 3 is inserted into the cylindrical expanded chamber 2 from the rear end of the cylindrical expansion chamber 2, and the cylindrical inlet tube 1 and the cylindrical outlet tube 3 are expanded relative to cylindrical expansion. The cavity 2 is biased, and is located on both sides of the center axis of the cylindrical expansion chamber 2, the distance between the central axis of the cylindrical inlet tube 1 and the central axis of the cylindrical expansion chamber is equal to the cylindrical outlet tube 3. The distance between the central axis and the centr...
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The invention discloses a three-dimensional modeling method for an impedance composite silencer, which comprises the following steps of: dividing an impedance composite silencer into five sound cavities, respectively suggesting cylindrical coordinate systems, and then mapping the cylindrical coordinate systems into inverted Chebyshev series; on the basis that the Chebyshev series and the Fourier series are combined to construct the triple Chebyshev-Fourier series to represent the sound pressure function of the sound cavity, the influence of sound absorption materials with different areas and different arrangement modes on the noise elimination performance of the impedance composite silencer can be achieved only by adjusting the integral region, and modeling and grid division do not need to be conducted again. The flexibility is high; in the aspect of calculation, most matrixes obtained through calculation are sparse matrixes, calculation is faster compared with an existing finite element method, when the method is used for model optimization, the model optimization flexibility is high, the calculation speed is high, the calculation precision is adjusted by changing the truncation number, and the calculation precision is controllable; the method has the advantages of high flexibility, high calculation speed and high modeling precision.
Description
Technical field [0001] The present invention relates to a three-dimensional modeling method of muffler, and more particularly to a three-dimensional modeling method of impedance composite muffler. Background technique [0002] The muffler structure is widely used in the intake system of vehicles and ship engines and various models of electricity, chemical, metallurgy, and textile and other industrial plants, various models of boilers, wind turbines, safety doors and other equipment. Monografter basic structural units typically have expandable structures, inserted tube structures, Herme Hoz resonance cavity, perforal structure, variable cross-sectional pipe structure, reflow structure, tee structure, micro-pore pipe structure, side branch structure, absorption Structure, etc. The muffler has a variety of classification methods, which can be divided into cylindrical muffler, an elliptical muffler, an elliptical muffler, an elliptical muffler, a resistant muffler and an impedance co...
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Login to View More IPC IPC(8): G06F30/20
CPCG06F30/20Y02T10/40
Inventor 陈跃华许强令狐世勋赵天通张刚冯志敏
Owner NINGBO UNIV