城市区域调峰天然气球罐复合型裂纹扩展影响因素分析  

Analysis on Influence Factors of Mixed-mode Crack Growth on Peak-Shaving Natural Gas Spherical Tanks in Urban Areas

作　　者：刘峰 陈鹏翔 Liu Feng;Chen Pengxiang(Gas Supply Branch of Chongqing Gas Group Co.,Ltd)

机构地区：[1]重庆燃气集团股份有限公司供气分公司

出　　处：《城市燃气》2022年第4期28-32,共5页Urban Gas

基　　金：重庆市自然科学基金面上项目“碳钢表面P-N异质结薄膜光阴极保护性及光电子传输机制研究”(编号:cstc2019jcyj-msxmX0181)。

摘　　要：本文以某燃气企业区域调峰天然气球罐为例,针对开罐检测发现的裂纹扩展的问题,基于断裂力学基本理论,分析裂纹扩展作用机理,从Ⅰ型、Ⅱ型裂纹应力强度因子计算方法入手,利用叠加原理得出了Ⅰ-Ⅱ复合型裂纹应力强度因子计算方法应用该计算方法分析了裂纹扩展的影响因素,结果表明:初始裂纹尺寸和运行压力为主要影响因素该计算方法提供了一种预测调峰天然气球罐裂纹扩展的分析方法。By taking peak-shaving natural gas spherical tanks of a gas enterprise's as an example,aiming at problems of crack growth found in tank-opening detection,it analyses the mechanism of crack growth based on the principal theory of fracture mechanics.By means of the calculation methods of stress intensity factor in crack mode I and II,the calculation method of its stress intensity factors composite cracks is obtained.Applying this method,it analyses the influence factors of crack growth and it is resulted that initial crack size and operating pressure are the main influence factors.This method provides an analytical method for predicting crack growth of peak-shaving natural gas spherical tanks.

关 键 词：城市区域 调峰天然气球罐 裂纹扩展 应力强度因子 裂纹尺寸 运行压力 

分 类 号：TU996[建筑科学—供热、供燃气、通风及空调工程] O346.1[建筑科学—市政工程]