摇摆模拟基于数值消散的摇摆模拟
A M D'Altri1,2, G Vlachakis2, S de Miranda1
1Department of Civil, Chemical, Environmental, and Materials Engineering, University of Bologna, Bologna, Italy.
Nonlinear dynamics
|August 29, 2024
概括
一种新的计算方法准确地模拟了使用数值消散而没有减压模型的摇滚块. 这种方法使得对遗产结构至关重要的结构元素能够在很长的时间内进行快速分析.
科学领域:
- 计算力学是计算力学.
- 结构动力学 结构动力学
- 地质技术工程地质技术工程
背景情况:
- 模拟摇块的动态行为对于评估结构,特别是历史结构的稳定性至关重要.
- 传统的方法通常依赖于减压模型,这些模型可能无法完全捕捉撞击期间复杂的散射现象.
- 需要准确和高效的计算工具来分析各种负载条件下的摇块响应.
研究的目的:
- 提出一种新的计算方法来模拟基于数值散射的摇滚块.
- 开发一种准确和有效的方法来预测冲击时的摇摆消散现象.
- 在数值模拟中建立一个回归定律,用于在数值模拟中选择最佳时间步骤.
主要方法:
- 理想化摇块作为一个固体体,以接触为基础的配方.
- 采用隐式时间集成方案,以优化数值消散.
- 进行数值运动,以获得时间步骤设置的分析回归定律.
主要成果:
- 拟议的数值散射精确地预测了摇摆散射,而没有明确的减压模型.
- 对于时间步骤选择,建立了一个经过验证的回归定律,这取决于块几何,刚度和还原系数.
- 与结构工程相关的摇块的模拟可以通过大时间步骤 (10−3到10−1秒) 实现,确保计算效率.
结论:
- 数字消散方法为模拟摇摆块提供了一种有效和高效的方法.
- 衍生的回归定律提高了模拟中的时间步骤选择的准确性和可靠性.
- 这种方法对文化遗产结构和其他关键工程应用的分析具有重大前景.
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