Research on Elastic Design About Filament Wound Barrel of Railgun

Xiao, Hongcheng; Yin, Dongmei; Li, Baoming

doi:10.1109/tps.2017.2705432

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…Among these methods, bolt pre-tightening and filament winding are the most commonly used for achieving pre-stress in railguns equipped with composite barrels. However, studies on pre-stressed barrels have primarily focused on the stress distribution of the barrel [29][30][31][32][33][34], and there have been few investigations into the mechanism of how pre-stress influences the railgun system. The influence of pre-stressed composite barrels on railguns has been extensively studied.…”

Section: Introductionmentioning

confidence: 99%

Factors Influencing the Expansion of Arch-Shaped Electromagnetic Railguns with Pre-Stressed Composite Barrels

et al. 2023

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Rail expansion significantly impacts the launch precision of a railgun system. Higher precision can be achieved when the extent of expansion is low. This paper investigates three main factors that influence the extent of rail expansion using the finite element method, including pre-stress, electromagnetic load, and stiffness of the insulators. The mean squared error between experiment results and simulating results is less than 0.06, validating the finite element model. The simulated results reveal that the extent of rail expansion increases with a decrease in pre-stress and an increase in electromagnetic pressure and the stiffness of the insulator is the most significant influencing factor, as the use of a stiff insulator not only results in a small extent of rail expansion but also delays the separation between the rails and insulators. The mechanism of how pre-stress influences the railgun system has been proposed. It has been expressed that the pre-stress maintains the integrity of the railgun system by hindering the process of a decrease in the contact surface area between rails and insulators during launch. The study provides a platform to improve the design of the railgun system.

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Section: Introductionmentioning

confidence: 99%

Factors Influencing the Expansion of Arch-Shaped Electromagnetic Railguns with Pre-Stressed Composite Barrels

et al. 2023

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“…Different from the composite barrel of traditional artillery, the structure of the composite barrel of electromagnetic railgun is more complex, and its constituent materials and section geometry are more diversified. In order to improve the stiffness and seal performance for the inner bore of railgun barrel, the pretension winding technology is used in its manufacturing process, which can lead the residual prestress in the barrel [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

A numerical simulation approach for the residual prestress of composite barrel with non-round section of railgun with tension winding

Yin

2023

J. Phys.: Conf. Ser.

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In order to obtain the distributions of residual prestress of the filament wound composite barrel with non-round section for railgun caused by the winding tension, a new numerical approach is provided. Based on the idea of considering the fiber bundles as the main load-bearing material for each winding layer, the loading of the initial winding tension in the winding process can be simulated through loading the initial tensile stress of the fiber bundles in fiber direction of the winding layers’ elements. Firstly, combing with the element birth and death technology, a three dimension finite element model for a hybrid filament wound cylinder with metal liner is established to simulate its residual prestress caused by winding tension. Its results are compared with the ones obtained by the theoretical model, which verifies that this numerical simulation method is reliable to some extent. Then, this numerical simulation method is adopted to analyze the residual prestresses of the filament wound composite barrels with non-round section for railgun, which are under three different winding tension control modes respectively. The results can provide some references to the initial design of the filament wound composite barrel with non-round section for railgun.

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Analysis and discussion on launching mechanism and tactical electromagnetic railgun technology

Lin

2018

Defence Technology

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Research on Elastic Design About Filament Wound Barrel of Railgun

Cited by 4 publications

References 8 publications

Factors Influencing the Expansion of Arch-Shaped Electromagnetic Railguns with Pre-Stressed Composite Barrels

Factors Influencing the Expansion of Arch-Shaped Electromagnetic Railguns with Pre-Stressed Composite Barrels

A numerical simulation approach for the residual prestress of composite barrel with non-round section of railgun with tension winding

Analysis and discussion on launching mechanism and tactical electromagnetic railgun technology

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