一种优化方法,以建立软硬冲击模型的动态等价性
Bo Tian1, Shan Yin1, Joseph Páez Chávez2,3
1Exeter Small-Scale Robotics Laboratory, Engineering Department, University of Exeter, Exeter EX4 4QF, United Kingdom.
Chaos (Woodbury, N.Y.)
|July 1, 2024
概括
本研究介绍了一种计算方法,用于创建具有软和刚性约束的冲击系统中等效的动态反应. 该方法准确地模拟了影响,比现有的物理财产识别技术提供了优势.
科学领域:
- 计算动力学计算动力学
- 非线性系统分析分析
- 机械工程 机械工程
背景情况:
- 振荡冲击系统通常涉及不同的约束类型 (软与硬) 下的复杂相互作用.
- 准确地建模这些影响对于预测系统行为和识别物理性质至关重要.
- 现有的方法可能面临不连续性和准确性的挑战,特别是软约束.
研究的目的:
- 开发一种计算方法,用于在振荡冲击系统中建立等效动态响应.
- 为了确定符合刚性约束行为的软约束的刚性和缓冲参数.
- 为分析冲击系统提供更准确,更方便的方法.
主要方法:
- 使用了与大都会标准相结合的适应差异进化算法.
- 算法确定了软约束参数 (刚性,减压) 基于对刚性约束的规定的还原系数.
- 基于能量消耗和接触时间的持续时间,对等动态反应进行了评估.
主要成果:
- 这两种模型 (软约束和硬约束) 显示在大额归还系数的分叉图中几乎相同的动态反应.
- 当使用低归还系数时,在模型之间观察到差异.
- 数字测试证实,与以前的技术相比,拟议的方法的效率提高了.
结论:
- 开发的计算方法有效地建立了对具有软和刚性约束的系统产生影响的同等动态反应.
- 该方法为分析撞击系统提供了更高的准确性和方便性,特别是在实验性识别撞击表面特性时.
- 这种方法减轻了在撞击事件期间处理数值集成中不连续性的潜在不准确性.
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