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理论上推导了厚壁圆筒在内压及热载荷共同作用下的最佳自增强压力,并基于ANSYS的优化分析结果对理论解进行了验证。结果表明最佳自增强压力的理论解与数值解一致,最大误差不超过1%;另外,不考虑热载荷进行自增强后,会增大工作状态下厚壁圆筒内外壁应力差,降低结构的疲劳强度;工程上可根据本文解析解进行自增强处理,以提高厚壁圆筒的承载能力。
The optimal self-pressurizing pressure of thick-walled cylinder under the combined action of internal pressure and thermal load is theoretically deduced, and the theoretical solution is verified based on the results of ANSYS optimization analysis. The results show that the theoretical solution of the optimal self-reinforced pressure agrees well with the numerical solution, and the maximum error does not exceed 1%. In addition, self-reinforcing without considering the thermal load will increase the stress difference between the inner wall and the outer wall of the thick- Of the fatigue strength; engineering can be based on the analysis of this article self-enhancement treatment to increase the carrying capacity of thick-walled cylinder.