Method of Optimization Design of Flexible Shell for Non-metal Pressurized Reservoir with Variable Volume

doi:10.3901/JME.2025.10.439

Abstract

Abstract: Hydraulic reservoir with variable volume is widely concerned because of its pressurized oil, small volume and light weight. The reservoir compensates the oil volume difference of the system by changing the shape of its flexible shell, and the reasonable design of the shell is crucial to the overall life and the stable pressure output of the reservoir. In order to realize the efficient design of the reservoir shell satisfying the strength and lightweight, an optimized design method of the flexible shell of the non-metal pressurized reservoir with variable volume is proposed. Firstly, the structural volume mathematical model of the reservoir is determined according to the basic configuration structure relationship of the reservoir shell, and through the analysis of the reservoir shell, the performance index parameter models of the annular stress, axial stress and shell mass of the reservoir shell are established. Then, the parameters of the variable to be optimized and its range are determined, and the minimum of the annular stress, axial stress and shell mass are taken as the optimization objective function. Under the constraints of machining size and reservoir volume, the reservoir structure is optimized based on multi-objective genetic algorithm, and the Pareto optimal solution set is obtained. Finally, the parameter relation matrix of the reservoir shell is defined based on the quality function deployment method, and the comprehensive evaluation function of the reservoir shell design is constructed to determine the best solution, and the finite element simulation is used to calculate the stress, which verifies the feasibility of the method. This design method provides theoretical guidance for the lightweight design and optimization of hydraulic reservoir.

Key words: hydraulic reservoir, non-metallic reservoir, variable volume, flexible shell, optimal design

CLC Number:

TH137

YAO Jing, WANG Dingyu, HE Aiwen, HAO Jinlu, WANG Feixue. Method of Optimization Design of Flexible Shell for Non-metal Pressurized Reservoir with Variable Volume[J]. Journal of Mechanical Engineering, 2025, 61(10): 439-449.

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