An Optimal Design Method for U-shaped Bellows Under High Pressure Externally

Abstract

The invention relates to an optimization design method of a U-shaped bellows capable of bearing outside high pressure, and an adaptive optimization design method based on a genetic algorithm is utilized. The optimization design method of the U-shaped bellows capable of bearing the outside high pressure comprises firstly establishing a mathematical model of an optimization design of the bellows to compute the geometric parameters of the bellows, optimizing the geometric parameters of the bellows, and finally performing stability analysis on optimization results according to finite element software. According to the optimization design method of the U-shaped bellows capable of bearing the outside high pressure, the optimization design of the U-shaped bellows capable of bearing the outside pressure is achieved, and a fast and reliable method is provided for the design of the U-shaped bellows capable of bearing outside pressure; experiments show that the computed results of the bellows which is capable of bearing outside pressure and is designed through the optimization design method of the U-shaped bellows capable of bearing the outside high pressure and experimental results coincide well, and the error is within 10%, so that the optimization design method of the U-shaped bellows capable of bearing the outside high pressure is effective and reliable.

Description

technical field [0001] The invention relates to an optimal design method of a U-shaped bellows externally subjected to high pressure, which is used in the optimal design of multi-layer U-shaped bellows products for rocket and missile pressurized delivery system valves, and belongs to rocket and missile pressurized delivery system valves technology field. Background technique [0002] U-shaped bellows is an elastic element. As an important flexible connection and elastic compensation element, it is widely used in petroleum, chemical industry, electric power, nuclear energy, aerospace and other fields due to its good structure and performance. The lower bellows bears the internal pressure. The U-shaped bellows that withstand external high pressure are generally used as the forced brake chamber of the valve, which plays the role of low-temperature sealing and compensation for displacement. The bellows for this function need to have a smaller axial stiffness under the condition...

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Problems solved by technology

[0003] At present, although the calculation of the performance parameters of bellows mostly has calculation formulas stipulated in national standards, it is still very cumbersome to calculate and design specific bellows according to the working conditions, and because these formulas are approximate formulas, and are mainly applicable to internal Pressure bellows, if used for external pressure bellows will produce a large error

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