全铝合金越野摩托车车架的结构设计与研究

Structure design and analysis of aluminum cross-country motorcycle frame

车架是越野摩托车的主要受力部件,要求具有足够的强度和刚度且质量轻便。依据仿生学原理新设计了车架整体结构,采用常规力学及有限元方法详细分析了摩托车在完成极限动作时车架的受力状况。得出不同落地方式情况下(前轮先落地,后轮先落地,双轮同时落地)车架最大应力值及危险截面出现部位。结果表明,6061铝合金车架具有高的刚性与强度,在上述三种落地方式下车架均不会出现裂纹和变形,能满足设计要求。

The frame is the main force bearing part of the cross - country motorcycle. The frame should be enough strength, rigidity and light weight. The entire frame of the motorcycle has been designed by bionics principle. The force bearing condition of frame has been analyzed by conventional mechanics and FEA. The force being analyzed was produced at the limit sport motion. The maximum stress and dangerous section of the cycle frame at different landing conditions, such as front wheel lands first, rear wheel lands first and two wheels land simultaneously, have been cleared. The result confirms that 6061 aluminum alloy frame pos- sesses enough rigidity and strength which can meet the design requirement; crackles and deformation of the frame could not be happened at the three landing conditions.