矩形薄壁梁轻量化结构设计理论及数值模拟

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为研究车身薄壁梁刚度与轻量化之间的关系,对客车车身中常用的矩形薄壁梁刚度表达式进行了理论推导.首先,以刚质比作为评价体系,对基于刚度特性的矩形薄壁梁结构轻量化进行理论研究.然后,将铝和钢的刚质比进行对比,得到钢替换成铝后既满足结构刚度特性又能实现轻量化的几何表达式.最后,采用理论及数值模拟2种方法,通过算例对具有刚度特性的轻量化理论进行验证,并对不同尺寸的铝矩形薄壁梁进行研究,得出刚质比与铝钢高度比之间的关系表达式,可为后续进一步的轻量化理论设计提供依据.
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