Numerical Simulation Of Drop Test Of Scale Model For Radioactive Material Transport Container

With the increasing application of nuclear energy in various fields,the demand for radioactive materials has also grown.If a leak occurs,it will result in a large number of casualties and property losses.The remaining troubles will not be eliminated for decades.Therefore,the safety of radioactive material transport is particularly important.However,due to the large volume and mass of the transport container,the complicated equipment used in the test,the expensive equipment used,and the strict requirements for simulating real environmental conditions,it was determined that the traditional test method could not be used to test the full-size transport container.Therefore,it is a cost-effective method to use the contraction ratio model instead of the prototype container to carry out safety testing in key parts.However,when using the contraction ratio model for experiments,due to the different size parameters,it can not be determined whether the model's stress,strain,contact force,acceleration,reaction time and other response variables will produce different results.Therefore,it is necessary to use the law of proportionality as a basis to show the relationship between the various variables between prototype and scale models.Based on Buckingham's "Theorem of the theorem" in dimensional analysis,the proportionality law of container of scaled model was deduced.Taking the real cylindrical radioactive material transport container as an example,the ABAQUS dynamic explicit algorithm is used for the prototype and the one-half,one-quarter,and one-eighth scale model,from the height of 9 meters to the bottom angle under accident conditions.The impact of the falling attitude on the rigid ground is simulated numerically considering the dynamic response under both the material strain rate and material strain rate.Six reference points in four different scale models were selected,and the strain,stress,acceleration,time,and the contact force between the container and the rigid ground were calculated and analyzed.Finally,the results are compared with the proportional law,and it is found that the basic agreement with the proportional law.Under certain conditions:a=??=a??/m,F??=F??m2,???=???,???=???,t??=t??mIn the range of one-half to one-eighth reduction ratio,the proportionality law is applicable to the scale model test of radioactive material transport containers,providing a scientific basis for the alternative test of the original container.