A STUDY ON THE DEVELOPMENT PROCESS OF BUS SUPER STRUCTURE FOR ROLLOVER SAFETY

摘要

Dynamic collapse behavior for a bus body structure in rollover was studied. Since the purpose of this study is to make a well-established development process of a bus body structure for rollover safety, the suitable development method for each design stage from a component to complete body structure were considered in this study. For the efficient approach of the concept design stage, a beam-spring hybrid FE model combined with plastic hinge theory was used instead of detailed shell models. After setting up the concept design for the component size and geometry, the shell model was used to confirm and optimize the whole structure composition, and also to examine the influence of rollover environment like body contact ground condition and friction force. The process developed in this study was practically used as an effective method to predict the rollover behaviour of a new bus body structure.