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首页> 外文会议>ASME(American Society of Mechanical Engineers) Pressure Vessels and Piping Conference vol.8: Seismic Engineering; 20050717-21; Denver,CO(US) >SIMPLIFIED MODELING AND DETAILED CRACK PROPAGATION ANALYSIS FOR CRACKED PIPES
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SIMPLIFIED MODELING AND DETAILED CRACK PROPAGATION ANALYSIS FOR CRACKED PIPES

机译：裂纹管的简化建模和详细裂纹传播分析

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摘要

Two analysis approaches for a cracked pipe subjected to a seismic load were focused on. The first approach is a simplified modeling technique using a nonlinear spring element. A degrading model called a deteriorating distributed element was improved to simulate the asymmetric and degrading behavior of a cracked pipe. The second approach is a detailed crack propagation analysis using the finite element method (FEM). This approach is based on fracture mechanics, and crack growth is determined by using fracture parameters such as the J-integral range obtained from the FEM. Iterative re-meshing of the analysis model using solid elements was conducted to evaluate fatigue crack growth for cyclic loads. These two approaches were applied to a cracked pipe test. In comparing the test results, it was confirmed that the simplified modeling and detailed analysis approaches are applicable to a seismic analysis for a cracked pipe.
机译：重点讨论了地震作用下破裂管的两种分析方法。第一种方法是使用非线性弹簧元件的简化建模技术。改进了退化模型（称为退化的分布元素），以模拟破裂管道的不对称和退化行为。第二种方法是使用有限元方法（FEM）进行详细的裂纹扩展分析。此方法基于断裂力学，并且通过使用断裂参数（例如从FEM获得的J积分范围）确定裂纹扩展。使用实体元素对分析模型进行迭代重新网格化，以评估循环载荷下的疲劳裂纹扩展。这两种方法都用于裂纹管测试。在比较测试结果时，已确认简化的建模和详细的分析方法适用于破裂管的地震分析。

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