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Valves of this research project is the use of computer simulation test system technology, designed to simulate the valve prior to manufacturing the actual working conditions of the simulation tests, the performance of the product can be given a preliminary evaluation, design flaws corrected, to ensure the effectiveness of each step after the design. The system calculated by finite element analysis to determine the design of the valve under actual operating conditions of the stress field, temperature field and displacement field, the final product is given sealing sealing performance, stem torque, valve various parts of the stress distribution as well as its main zero Parts of strength and deformation data and evaluation findings. System uses software WorkBench as a major platform for modeling and analysis, modeling characteristics according to its established valve assembly model, and its parametric definition of valve size by changing the parameters to generate a new, different types of valves, check whether the generated model physical structure, the degree of contact surface snapping, as well as the internal structure is reasonable. The valve body, stem, opening and closing pieces for contact analysis, and ultimately can be given stress, strain, and other mechanical contact force results. Throughout the project, the valve simulation model was made with the core content of the test is directly related to the accuracy of the final results of the analysis, so the valve modeling and simulation is the main content of this paper. On a finite element analysis for complex assembly structure model is parameterized definitions, assembly modeling process parameter determination is important and difficult. This article combines bottom-up and top-down method of assembling two models, the use of size parameters between components and assembly relationships, so that in the model coordinates and components forming the main local coordinate conversion process between the parameters be reflected. To establish a reasonable structure, forming a reliable parametric model for the purpose of the proposed structure of complex solid models assembled assembly parameters defined basic ideas and methods. Virtual reality technology has been widely used in modern industrial design and production, it has changed the traditional design methods and ideas, improve production efficiency. In this paper, the characteristics of virtual reality technology to the valve simulation, for example, describes the use of industrial design in virtual reality technology, as well as the design of products for the detailed process simulation. In the simulation, by changing the parameters of the valve, the valve openings discussed problem of stress concentration, combined with analysis results hole stress concentration curve plotted, and the formula for calculating the maximum stress was modified; addition, the simulation test than the pressure on the sealing surface for testing, the extracted effective seal than the pressure to get the width of the sealing surface and sealing than the pressure of the curve, and thus the valve strength and sealing performance assessed.
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