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为确定预冷器在水压试验中严重变形原因，分别取不同接触状态的换热管为研究对象，基于大变形假设，采用点、面接触建立含大量接触约束的非线性有限元模型。研究横向变形以及内压对管件临界载荷的影响，利用非线性稳定法对其后屈曲状态进行追踪，获得其负刚度曲线以及临界失稳载荷。
高压预冷器中换热管非线性失稳及后屈曲分析
【摘 要】
：
为确定预冷器在水压试验中严重变形原因，分别取不同接触状态的换热管为研究对象，基于大变形假设，采用点、面接触建立含大量接触约束的非线性有限元模型。研究横向变形以及内
【机 构】
：
建筑与环境学院,四川大学,成都,四川,610065,中国
【出 处】
：
中国计算力学大会2018暨国际华人计算力学大会2018
【发表日期】
：
2018年8期
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