Abstract

By establishing a mathematical model for the uneven structure of a spherical pressure vessel, based on the moment theory, a formula for calculating the stress at the joint between the neck and the body of the spherical tank is derived. The container model is established by the solid element and the shell element for simulation calculation. After verifying the credibility of the simulation result, the calculation result is compared with the simulation value. The results show that the stress calculation formula derived from the unevenness of the spherical tank can accurately calculate the stress value of the stress concentration in the container, and the container model established by the shell element under the same conditions is faster and more accurate than that of solid element calculation. Compared with the results obtained by the non-moment theory, the error is smaller.

摘要

通过建立球形压力容器不平整结构的数学模型，基于力矩理论，推导出球罐颈部与罐体连接处应力的计算公式。容器模型由实体单元和壳单元建立进行仿真计算。验证仿真结果的可信度后，将计算结果与仿真值进行比较。结果表明，根据球罐不平整度推导出的应力计算公式，可以准确计算出容器内应力集中的应力值，而壳单元在相同条件下建立的容器模型比计算公式更快、更准确。实体单元计算。