直埋供热多折角曲管的数值分析

Numerical Analysis on the Directly Buried Heating Bent Pipeline with Many Fold Angles

为了得到某工程直埋供热多折角曲管的最优设计方案,本文利用ANSYS有限元分析软件进行了模拟。通过对模型施加不同的边界条件,进行应力分析,确定了管段的破坏形式和应力危险点位置,并结合欧洲直埋规范,进行了疲劳寿命验算。和目前的设计方法相比,采用数值模拟分析方法可以大大减少补偿器和固定墩的数目,突破了规范对于较大折角的限制,而且降低了施工难度和工程投资,提高了管网的可靠性,对工程实际具有指导意义。

In order to get the optimal design scheme of a directly buried heating bent pipeline with many fold angles in a certain practical engineering, this paper simulated the pipeline by the ANSYS finite element analysis software. Through applying different boundary conditions to the model, the stress was analyzed, the destroy forms of the pipeline and the positions of stress danger points were determined, and the fatigue life was checked according to BS EN. Compared with the current design method, adopting numerical simulation analysis method has greatly reduced the number of the usage of compensators and fixed piers, broke through the restrictions for larger fold angle in the. standard, and at the same time, it has reduced the construction difficulties and the engineering investment, improved the reliability of the network, this paper has guiding significance to the engineering practice.