| The bottom of the cab is one of the body’s parts most affected by the blast shock in landmine explosion. Even if the body itself is not subject to significant damage, the blast wave from the bottom of the cab can cause fatal injuries for occupants. Therefore, to carry out the research on the protection of the bottom of cab is of great significance.In this paper, a vehicle cab was taken as the research object, from the perspective of the bottom protection, the response of the bottom of which and interior occupant injury issues under the impact of a landmine explosion were researched through a combination of simulation and test methods. Through the improved and optimization design for the weak protection parts of the cab bottom, the vehicle cab’s protection level against landmine was improved a lot. The main contents are as follows.An airblast simulation and test experiment s were carried out, which identified the basic methods of simulation analysis and verified the accuracy and validity of test methods and instruments.Simulation analysis based on ALE algorithm was selected to calculate the Finite Element Model of different TNT equivalents, obtaining pressure distribution under the cab bottom and structural response as well as dummy injuries; the cab bottom’s protection level was also been estimated.Test experiment of landmine explosion of different TNT equivalents was carried out, obtaining some results, such as failure modes of the cab at the bottom, pressure distribution and dummy injuries, to verify the reliability of the simulation analysis method. Besides, the cab bottom’s protection level was evaluated according to test results.The improved design was finished for the weak protection parts of the cab bottom, and verified the design with simulation method instead of test; Under the premise without changing the overall design, protective device was been optimization designed partly,and the cab bottom’s protection level was further improved. |
