Computer simulation of vehicle dynamics has become a valuable tool in the design of vehicles. They are, however, unable to accurately simulate the complex dynamics of fluid 'sloshing' in a tank on the vehicle. Computational Fluid Dynamics (CFD) analysis software is available that can predict fluid slosh, however, the use of this software in accurately predicting fluid slosh for a military vehicle application has not been demonstrated. This is the first phase of a multiphase program to develop and demonstrate the use of CFD analysis, coupled with vehicle dynamics analysis, to more accurately predict the dynamics of a fluid transport system. The objective of this phase is to validate the CFD analysis in predicting slosh dynamics on a tank subjected to motions of a vehicle encountering typical maneuvers. To accomplish this, a one-quarter- scale model of a TOLD tank was constructed, as well as a test fixture to simulate a five-ton FMTV truck. The reaction forces and the fluid motions of the CFD analysis and the laboratory test were compared for six simulated vehicle maneuvers including lane changes and bumps. The CFD analysis was conducted with the commercially available software package, FLOW-3D-. The net fluid force and moment predictions were added to the force and moment predictions of a rigid body dynamic analysis of the empty tank alone to compare to the corresponding measured values for the test tank. Overall, the results show that CFD can successfully be applied to the study of fluid motions and the fluid- structure interactions in truck-mounted water transport tanks. There is good correlation between the predicted and measured roll moment. Given the rapid turnaround time for the CFD simulations presented here, the outlook is encouraging for coupling a vehicle rigid body dynamics analysis to a fluid dynamics analysis for a high fidelity simulation of the complete vehicle response to maneuvers.


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    Title :

    Coupled Simulation of Vehicle Dynamics and Tank Slosh. Phase 1 Report. Testing and Validation of Tank Slosh Analysis


    Contributors:
    G. R. Wendel (author) / S. T. Green (author) / R. C. Burkey (author)

    Publication date :

    2002


    Size :

    59 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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