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为使车体钢结构进一步轻量化,要最大限度地利用材料强度,减薄外墙板,缩细骨架。但如此将使车体刚度下降,当列车运行在不平轨道上时,由于车体晃动,极容易产生挠曲振动,使舒适度下降。根据车体弯曲刚度与舒适度之间关系的理论研究结果,越是高速车辆,要求车体刚度越大。为了实现车体钢结构质轻且满足强度、刚度的要求,除了采用极限设计去掉多余的结构外,还要考虑应用FRM(例如,碳化硅纤维回火铝合金)和CFRP(碳化纤维增强塑料)等新型原材料;采用蜂窝结构材料;在
To make the car body steel structure further lightweight, to maximize the use of material strength, thinning the outer wall panels, narrow skeleton. But this will make the body stiffness decreased, when the train running in uneven orbit, due to the body sway, it is easy to produce flexural vibration, so that comfort decreased. According to the theoretical study of the relationship between the bending stiffness and the comfort of the car body, the higher the speed of the car, the greater the rigidity of the car body is required. In order to achieve the lightweight steel body and meet the strength and stiffness requirements, in addition to using the limit design to remove excess structure, but also consider the application of FRM (such as silicon carbide fiber tempering aluminum alloy) and CFRP (carbon fiber reinforced plastic) Such as new raw materials; the use of honeycomb structure materials;