【摘要】 选取纤维增强热塑性塑料（RTP）复合输氢管道中常用的锥套型接头，使用Solidworks绘制三维结构，并使用Ansys对其力学性能和密封性能进行静力学仿真分析。以管道内层最大等效应力、管道内层与芯轴接触处的接触压力为优化目标，套筒处的扣压量为被优化变量，构建多目标优化问题，求得最优扣压量数值为1.99 mm。以管道内层最大等效应力、管道内层与芯轴接触处的接触压力及接触面积为优化目标，芯轴上锯齿的齿高和齿角为被优化变量，构建多目标优化问题，求得最优齿高、齿角分别为1.60 mm、52°。并将最优齿形参数下的Kriging模型预测值与Ansys仿真结果对比，求得等效应力的相对误差为2%，接触压力的相对误差为0.7%，接触面积的相对误差为0.3%，验证了代理模型的准确性。优化后，最大接触应力较初始值提高了24%，内层最大等效应力减小了30%，有效提升了管接头的综合性能。更多还原

【Abstract】 In this study, the cone sleeve joint commonly used in fiber-reinforced thermoplastic composite hydrogen transmission pipelines was selected. Its three-dimensional structure was modeled using SolidWorks, and simulations of its mechanical and sealing performances were conducted via ANSYS. A multi-objective optimization problem was established with the maximum equivalent stress of the pipe inner layer and the contact pressure between the pipe inner layer and the mandrel as the optimization objectives, and the crimping amount at the sleeve as the optimization variable. The optimal crimping amount obtained was 1. 99 mm. Subsequently, another multi-objective optimization problem was constructed, taking the maximum equivalent stress of the pipe inner layer, the contact pressure between the pipe inner layer and the mandrel, and the contact area as the optimization objectives, and the tooth height and tooth angle of the mandrel teeth as the optimization variables. The optimal tooth height and tooth angle were determined to be 1. 60 mm and 52 °, respectively. A comparison between the predicted values of the Kriging model and the ANSYS simulation results indicated that the relative error of the equivalent stress was 2 %, the relative error of the contact pressure was 0. 7 %, and the relative error of the contact area was 0. 3 %. Compared with the initial values, the maximum contact stress was increased by 24 %, and the maximum equivalent stress of the inner layer was reduced by 30 %, which effectively improved the comprehensive performance of the pipeline joint.更多还原