CAJ | 학술논문

客车骨架早期局部开裂问题影响客车的可靠性和耐久性。通过Patran和Nastran软件对某客车车身骨架进行了多种工况下的有限元强度分析。分析结果表明：该客车在各种工况下应力集中的位置基本一致，且与客车发生早期开裂的位置吻合，主要发生在前后悬架钢板脚附近以及侧窗立柱与上下梁的焊接处。根据强度分析结果对客车结构薄弱处进行改进优化，使其达到使用要求，提高了客车的可靠性和耐久性。
객차골가조기국부개렬문제영향객차적가고성화내구성。통과Patran화Nastran연건대모객차차신골가진행료다충공황하적유한원강도분석。분석결과표명：해객차재각충공황하응력집중적위치기본일치，차여객차발생조기개렬적위치문합，주요발생재전후현가강판각부근이급측창립주여상하량적한접처。근거강도분석결과대객차결구박약처진행개진우화，사기체도사용요구，제고료객차적가고성화내구성。
Early local cracking of bus body frame affects its reliability and durability. In this paper, the strength calculation of bus body frame was discussed under many kinds of operating modes through Patran and Nastran software. The analysis result indicates that concentrated stress area is almost same under different operating modes and is consistent with the position of the early cracking. It mainly ap-pears near by the foot plate of front and rear suspension and the welding area of windows column and beam. According to the results of strength analysis,the weaknesses of the bus structure are improved on the base of analysis results and make it optimize the requirements,and improve the reliability and durability of the bus.