Prediction method of vibration and noise of straight cylinder cage valve based on semi-analytical method and boundary element method

Abstract

A method for predicting the vibration and noise of a straight cylinder cage valve based on a semi-analytic method and a boundary element method of the present invention comprises the following steps: S1, establishing a three-dimensional solid simulation model and a finite element model thereof for the surface structure of the straight cylinder cage valve, and performing the three-dimensional solid simulation The model carries out the vibration mode analysis of the structure to obtain the surface vibration mode result set and the surface node coordinate file of the structure; S2, read in the surface vibration mode result set and the surface node coordinate file and the parameterized data of the three-dimensional solid simulation model, Combining the semi-analytical method and the boundary element method, the numerical iterative calculation of the three-dimensional solid simulation model is realized to obtain the parameters of sound intensity, sound pressure and sound frequency. The present invention combines the semi-analytic method with the boundary element method, uses the semi-analytic method to solve the problem of non-uniqueness of the boundary element method, analyzes the vibration and noise radiation of the valve in detail, and realizes the rapid solution and prediction of the sound radiation of the straight cylinder cage valve, for The noise reduction optimization design of subsequent valves provides a reference.

Description

technical field [0001] The invention relates to the field of industrial simulation technology, in particular to the field of valve structural vibration and noise simulation, and in particular to a method for predicting the vibration and noise of a straight cylinder cage valve based on a semi-analytic method and a boundary element method. Background technique [0002] With the advancement of science and technology, the requirements for the use of valves are getting higher and higher. Vibration and noise are one of the most obvious problems of valves. In actual work, they will affect the service life of the valve itself and the connected pipelines and equipment, and even directly cause damage resulting in a safety accident. At present, the research content on valve noise calculation and simulation is relatively rare. Some domestic scholars have combined the basic principles of fluid mechanics with Lighthill's quadrupole source theory to analyze the valve noise caused by low-s...

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Problems solved by technology

However, for models with complex structures and high-frequency acoustic problems, it is difficult to select the number and location of CHIEF points, so the CHIEF method is not applicable in engineering

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