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Research Papers: Design and Analysis

Experimental Research on Reactive Reinforcement Method for Cylindrical Vessel

[+] Author and Article Information
Yaguang Sui

State Key Laboratory for Disaster Prevention and
Mitigation of Explosion and Impact,
PLA University of Science and Technology,
Nanjing 210007, China;
Key Laboratory of Intense Dynamic
Loading and Effect,
Northwest Institute of Nuclear Technology,
Xi'an 710024, China

Dezhi Zhang, Bo Chen, Zhao Wang, Shiying Tang

Key Laboratory of Intense Dynamic Loading
and Effect,
Northwest Institute of Nuclear Technology,
Xi'an 710024, China

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received May 30, 2016; final manuscript received January 2, 2017; published online February 3, 2017. Assoc. Editor: Hardayal S. Mehta.

J. Pressure Vessel Technol 139(2), 021215 (Feb 03, 2017) (7 pages) Paper No: PVT-16-1088; doi: 10.1115/1.4035699 History: Received May 30, 2016; Revised January 02, 2017

With centrally loaded charges, the deformation of the cylindrical vessel is concentrated in the range of L/R = ±2 by the blast center. The reactive reinforcement method, which uses dispersive charges cooperating with vessels to control the concentrated charge, is presented in this study. The experimental research on this reactive reinforcement method is tested experimentally. Global and flakelike charges are selected as the inner and outer charges, respectively. This method primarily focuses on synchronizations, especially the detonation synchronization of such inner and outer charges. A detonation system is designed, and central and multipoint detonation techniques are used to control the synchronization. Three experiments are performed, of which two are advanced studies. The third is an experimental research on the method. Results show that the max time difference of the detonation system is 1 μs, suggesting good synchronization performance. The strain of the vessel is reduced by about 71.4% using the reinforcement method. This study provides a reference for the reinforcement method in practical applications.

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References

Dong, Q. , and Hu, B. , 2012, “ Engineering Design of a Multiple-Use Spherical Explosion Containment Vessel Subjected to Internal Blast Loading From 25 kg TNT High Explosive,” ASME J. Pressure Vessel Technol., 134(2), p. 021205. [CrossRef]
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Sui, Y. , Zhang, D. , Tang, S. , and Lin, O. , 2015, “ Theoretical Analysis of a Reactive Reinforcement Method for Cylindrical Explosion-Containment Vessels,” ASME J. Pressure Vessel Technol., 137(1), p. 011206.
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Figures

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Fig. 1

Experimental model: 1—electric detonator, 2—detonating charge, 3—detonating cord of outer charge, 4—detonating cord of the inner charge, 5—inner global charge, 6—the outer flakelike charge, 7—protective layer, 8—the steel vessel, and 9—the plank

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Fig. 2

Inner charge: (a) global charge and the small global charge and (b) detonation sequence

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Fig. 3

Flakelike charges and detonating cores

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Fig. 5

Photo of global charges in experiment 1: (a) global charge and (b) global charge in the vessel

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Fig. 6

Travel time of inner impact waves

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Fig. 7

Deformation of vessel suffered inner impact

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Fig. 8

Details and results of experiment 2: (a) photo of vessel before explosion, (b) detonation points and electric probe on the flakelike charge, (c) photo of vessel after explosion, and (d) strain profiles of the vessel in the axial direction

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Fig. 9

Signal of electric probes

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Fig. 10

Overall perspective of vessel before explosion in experiment 3

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Fig. 11

Explosive section after explosion in experiment 3

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Fig. 12

Comparison of the blast center

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Fig. 13

Strain curves in the axial direction of the vessels: (1) experimental data loaded with 183 g inner charge, (2) experimental data with 183 g inner charge and 3 mm outer charge, (3) theoretical result with 183 g inner charge, and (4) experimental result with 183 g inner charge and 3 mm outer charge

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Fig. 14

Photos of the exterior of the vessels

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Fig. 15

Design of decentralized charges

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