Inspired by the microstructure of the chelate impact area of the finch-tailed mantis shrimp

a new thin-walled energy absorption structure was proposed based on the traditional regular hexagonal thin-walled tube. The crashworthiness of the new bionic thin-wall structure is studied through test and simulation analysis. The results show that the structural parameters (top angle α

level ratio γ and wall thickness T ) have significant effects on the crashworthiness of the new bionic thin-walled tube. Meanwhile

comparing with the traditional regular hexagonal thin-walled tube of the same mass

the specific energy absorption and impact force efficiency of the new bionic thin-walled tube are improved by 62.76% and 55.90%

respectively. In addition

the response surface method and multi-objective particle swarm optimization algorithm are combined to optimize the structure

and the corresponding Pareto frontier diagram is obtained. The results provide a guidance for designing and optimizing the thin-walled structures.