Study on dynamic response and reliability of liquid hydrogen cylinder support structure under complex load
In this paper,the finite element method was used to compare the dynamic response and reliability of rigid and flexible support structures for vehicle-mounted 1 500 L liquid hydrogen cylinders under different working conditions.The natural frequency characteristics,resonance and vibration morphology of the cylinder under different support forms were evaluated by mo-dal analysis and random vibration analysis.At the same time,the impact load under six complex working conditions is simulated,and the stress and deformation response of the cylinder are analyzed.The results show that in the modal analysis,the natural fre-quency of the rigid support cylinder is generally higher than that of the flexible support cylinder,and the deformation is smaller under the same working condition.In the random vibration analysis,the stress response of the rigid support in the Y direction is lower than that of the flexible support,but the velocity and acceleration responses are higher,indicating that the flexible support performs better in the high-frequency vibration environment.Rigid support is suitable for low frequency or static load,while flexible support is more suitable for high frequency vibration environment.
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