电缆杯形管节密封强度分析

Analysis of Cable Cup Shape Seal Strength

利用复合材料层合板理论对碳纤维增强聚氨酯(PU)密封胶在海水压力下的受力状况进行了简要的数学分析,并结合耐压试验结果,对碳纤维增强PU密封胶的老化及渗漏性能进行了分析。结果表明:应用层合板理论计算得到的复合材料环体的轴向压缩强度、环向拉伸强度、径向压缩强度及受力情况均满足设计要求;但是,上述计算均以碳纤维增强PU胶粘剂材料的静态力学性能为依据的,而复合材料环体在工作时成动态力学状态,故应用层合板理论进行相关性能的计算还存在着一定的误差;目前采用碳纤维增强PU缠绕工艺、辅以表面处理剂和净水隔离剂后所制备的电缆密封胶,在7MPa压力作用下,环型管节没有泄露,与计算结果预测一致。

Using composite laminated plate theory, the stress condition of carbon fiber reinforced polyurethane （PU） sealant under seawater pressure is discussed briefly by mathematical analysis. Combining with the pressure test results, the aging and leakage performance of carbon fiber reinforced PU is analyzed. The results show that the axial compression strength, annular tensile strength, radial compression strength and stress distribution of the composite wreath can meet the design requirement calculated by laminated plate theory. However, the calculation of carbon fiber reinforced PU adhesives materials mentioned above is based on the static mechanics performance, and the composite wreath at work is under dynamic mechanics state, so there is certain error when using the laminated plate theory to calculate the related performance. Currently, the cable sealant which is prepared with using carbon fiber reinforced PU winding technology and complementing with surface treatment and water-isolating reagent makes the annular tube coupling have no leakage under 7MPa pressure, and the results agrees with the calculation.