论文部分内容阅读
分析管道应力标准的非线性工程方法应用于管道设计,能更准确地确定管道的实际应力—应变,提高管道的运行可靠性。叙述和比较了部分管道应力规范,指出在管道应力分析和管道设计中,应考虑管材的非线性特性。给出了通过壁厚与温差变化关系体现出的管道线性和非线性分布图。从纵向应力线性和非线性分布图得出的结论是:最大压缩性弯曲应力的非线性解析结果比线性解析结果低18％,当量应力则低3％。推导出了计算应变的迭代公式,其迭代结果可应用于管道设计。
The non-linear engineering method to analyze the pipeline stress standard is applied to the pipeline design to determine the actual stress-strain of the pipeline more accurately and improve the reliability of the pipeline. Described and compared some of the pipe stress specifications, pointed out that in the pipe stress analysis and pipe design, pipe nonlinear characteristics should be considered. The linear and non-linear distributions of pipelines, which are shown by the relationship between wall thickness and temperature difference, are given. The conclusion drawn from the linear and nonlinear profiles of longitudinal stress is that the nonlinear analysis results of the maximum compressive bending stress are 18% lower than the linear analysis results and 3% lower than the equivalent stress. The iterative formula for calculating strain is deduced, and the iterative result can be applied to pipeline design.