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RESEARCH PAPERS

The Simulation of Dual Layer Fuel Tank During the Impact With the Ground Based on Parallel Computing

[+] Author and Article Information
Li Zheng

High Performance Computing Center, Room 225, Mechanical Engineering Building, Shanghai Jiaotong University, No. 800 Dongchuan Road, Shanghai 200240, Chinazlibest@sjtu.edu.cn

Jin Xiang-long, Chen Xiang-dong

High Performance Computing Center, Room 225, Mechanical Engineering Building, Shanghai Jiaotong University, No. 800 Dongchuan Road, Shanghai 200240, China

J. Comput. Nonlinear Dynam 2(4), 366-373 (May 23, 2007) (8 pages) doi:10.1115/1.2756078 History: Received January 28, 2007; Revised May 23, 2007

The crashworthiness of a dual layer fuel tank, with the outer layer made of metal and the inner layer made of woven fabric composite material, is fundamental for the survivability of an impact with the ground in emergency. In this research, the simulation of a three-dimensional dual layer fuel tank in the impact with the ground is achieved through the multimaterial arbitrary Lagrangian-Eulerian (ALE) finite element method because of its ability to control mesh geometry independently of geometry. At the same time, the naked flexible tank in the impact with the ground is simulated for the evaluation of the outer metal tank. The ALE description is adopted for the fluid domain, while for the structural domain the Lagrangian formulation is considered. The computation of the fluid-structure interaction and the impact contact between the tank and the ground are realized by the penalty-based coupling method. Then, the dynamic behaviors of the dual layer fuel tank and the naked flexible tank in the impact are analyzed. In the meantime, the parallelism of the dual layer fuel tank is discussed because the computation of the fluid-structure interaction and the impact contact is quite time consuming. Based on domain decomposition, the recursive coordinate bisection (RCB) is improved according to the time-consuming characteristics of fluid-filled tank in the impact. The result indicates, comparing with the RCB algorithm, that the improved recursive coordinate bisection algorithm has improved the speedup and parallel efficiency.

Copyright © 2007 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Multimaterial element

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Figure 2

Two subdomain mapping

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Figure 4

Finite element model about the dual layer tank

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Figure 5

Finite element model about the naked flexible tank

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Figure 6

Stress versus strain about the inner flexible tank

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Figure 7

The energy of the dual layer tank

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Figure 8

Deform energy of the flexible tank

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Figure 9

The deformation at 0.022s

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Figure 10

The first principles stress distribution of the inner layer

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Figure 11

The first principles stress versus time

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Figure 13

Resultant velocity of the flexible tank

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Figure 14

Sloshing of the water inside the tank

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Figure 15

Sixteen subdomain decomposition descriptions

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Figure 16

Speedup by parallel processing

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