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根据CRH3型高速动车组侧窗的结构,设计了侧窗粘接接头的形式及粘接密封结构;根据胶粘剂厂商提供的数据及粘接工艺,分析设计了侧窗粘接厚度和接缝宽度。研究结果表明:侧窗粘接接头应选择搭接接头,粘接厚度的理论设计值为5～10mm,接缝宽度的理论设计值为10～17mm;将动车组侧窗的受力情况进行模型化,通过理论计算,并引入衰减因子和安全因子,可推算出侧窗粘接用聚氨酯(PU)弹性胶粘剂的剪切强度需超过0.54MPa,而目前国内外PU结构胶的剪切强度均超过此数值。
According to the structure of the side window of CRH3 high speed EMU, the form of side window adhesive joint and the structure of adhesive sealing are designed. According to the data provided by the adhesive manufacturers and the bonding technology, the side window bonding thickness and the joint width are analyzed and designed. The results show that the side joint should be lap joint, the theoretical design value of the bonding thickness is 5 ~ 10mm, the theoretical design value of the joint width is 10 ~ 17mm; Through the theoretical calculation and the introduction of attenuation factor and safety factor, it can be deduced that the shear strength of polyurethane elastic adhesive for side-window bonding needs to exceed 0.54MPa. However, the shear strength of PU structural adhesive both at home and abroad exceeds This value.