Abstract: Aiming at the problem that the driver is threatened by accidental falling objects during normal operation of forklift truck, the safety capability of a new type of roof bracket matched with forklift truck was studied.According to the requirement of national standard for dynamic loading test of roof bracket, a method used LSDYNA full restart analysis realized multiple impact test load of roof bracket was proposed. Based on above method, the explicit dynamic simulatio model of dynamic load test simulation was established and dynamic load test was carried out meanwhile. The permanent deformation obtained from simulation and test results at 18 test points of dynamic load test of the roof protector were compared. The maximum permanent deformation of the roof protector obtained by simulation and test methods was also studied and checked with the standard. The results indicate that the safety performance of the new roof bracket can not satisfy the requirements of the test standard and needs to be changed. However, the research shows that the established finite element simulation dynamic model with high reliability, which provides a basis and reference for further improving and perfecting the structure of the roof bracket.
Key words: overhead guard; dynamic loading test; explicit dynamics