CAJ | 학술논문

将换热器法兰接头作为一个系统进行研究，建立了 U 形管换热器法兰接头三维有限元模型。根据 ASME 中的经验公式采用等厚无孔圆平板代替开孔管板，得出了管、壳程压差作用下管板的应力分布情况。考虑了垫片材料的非线性和时滞效应，着重分析了操作工况下不同管、壳程压差对垫片应力分布及法兰接头紧密性的影响。
장환열기법란접두작위일개계통진행연구，건립료 U 형관환열기법란접두삼유유한원모형。근거 ASME 중적경험공식채용등후무공원평판대체개공관판，득출료관、각정압차작용하관판적응력분포정황。고필료점편재료적비선성화시체효응，착중분석료조작공황하불동관、각정압차대점편응력분포급법란접두긴밀성적영향。
In this paper, the flange joint was studied as a system; the three-dimensional finite element model of U-shaped heat exchanger flange joint was established. According to ASME empirical formula, an equivalent round plate without opening was used to replace the tube plate with opening; stress distribution of the tube sheet under differential pressure was obtained. Considering the nonlinear characteristics and time lag effect of the gasket material, effect of the pressure difference on stress distribution of the gasket and sealing performance of the flange joint under operating conditions was analyzed.