Abstract
In order to further increase the volume, reduce the weight and manufacturing cost, the key structural parameters of thin-walled metal packing container are optimized. The instability conditions under circumferential external pressure and axial load are analyzed, a mathematical model with the constraint of critical instability strength, the maximum volume and minimum mass as the objective is constructed. Multi-objective optimization method with nonlinear constraints is used to solve the key structural parameters, such as wall thickness, diameter and height, and the optimization result is calculated by fgoalattain() function in the Matlab optimization toolbox. The instability pressure test system is constructed, the instability pressure of the optimized thin-wall metal packing container is tested. The results show that the unstable pressure is higher than 120kPa, which are better than the design index.
Highlights
Thin-walled metal packing container is widely used in food packaging industry
The research ideas of this paper are as follows: firstly, the basic structure of thin-walled metal packing container is introduced briefly, and the optimization design problem is put forward; the mathematical model of optimization design is constructed, and the optimal design parameter value is obtained by using Matlab optimization toolbox; the key performance index of thin-wall metal packaging container is tested to verify whether it meets the design requirements
In order to ensure that the container does not lose stability under external pressure, the minimum critical instability pressure (Pcr) ≥ c × Pu, c is the safety factor
Summary
Thin-walled metal packing container is widely used in food packaging industry. It has the advantages of low water transmittance, no light transmission, good gas resistance and so on [1]. In order to further reduce the cost of batch production, it is necessary to strictly control the amount of material used in a single container, so as to ensure that the volume can be maximized and the quality minimized under the condition of resistance to standard atmospheric pressure. This puts forward higher requirements for the structural design of existing containers. As a kind of pressure vessel, thin-walled metal packing vessel has been studied on the optimization of pressure vessel structure It mainly focuses on basic structure optimization, structural parameter optimization and mathematical method optimization [5,6,7,8]. The research ideas of this paper are as follows: firstly, the basic structure of thin-walled metal packing container is introduced briefly, and the optimization design problem is put forward; the mathematical model of optimization design is constructed, and the optimal design parameter value is obtained by using Matlab optimization toolbox; the key performance index of thin-wall metal packaging container is tested to verify whether it meets the design requirements
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