OPTIMIZED DESIGN OF SAFETY STRUCTURAL FRONT OF PASSENGER CARS WHEN A HEAD-ON COLLISION

Abstract

Passenger car is one of the popular and important vehicles in transportation but the accidents caused by head-to-head collision are always leading to injuries and fatalities to passengers and drivers. Therefore, studying the structural optimization of passenger car’s head is urgently needed. This thesis is based upon the standard ECE R94 and ECE R66, applications of computer engineering (CAE) software which HYPERMESH to build finite elements model then simulate and analyze the structural safety of passenger car’s head when head- to-head collision happens with LS-DYNA. Base on the structural problems of the passenger car’s head, proceeding to give these improvement design to ensure the sustainability of structure and does not violate the safety space. In the selected solution, A5052 Aluminum is used in the structural improvement design of passenger car’s head. Then proceed to optimize structure to reduce mass and acceleration impact. Using the method of orthogonal experiment design to design simulation, applying software SPSS regression equation construction for optimal goal. Applying Genetic Algorithm in Mat-lab to calculate to find the optimize value. The results showed that the volume of the variables after the optimization reduced 9.8 % compared with the previous optimization, acceleration reduced 9.9 %, compared to before the optimization that safe space is still not compromised safety standards when head - to head collision occurred.