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冲击响应调节效应和圆形波形发生器的非线性动态模型
Chengwu Liu1, Yiming Wu1, Jingjing Wen2,3
1School of Astronautics, Northwestern Polytechnical University, Xi'an, Shanxi, 710072, China.
Heliyon
|October 15, 2024
概括
研究人员对圆形波形发生器 (LCWGs) 进行了冲击测试. 他们发现撞击速度和质量增加了峰值加速,而面积比则降低了它,使安全评估能够更好地进行动态建模.
科学领域:
- 机械工程 机械工程
- 材料科学 材料科学 材料科学
- 冲击波物理学 冲击波物理学
背景情况:
- 圆形波形发生器 (LCWGs) 对于在安全性和可靠性测试中产生冲击脉冲至关重要.
- 了解撞击下的LCWG行为对于开发准确的动态模型至关重要.
研究的目的:
- 调查LCWG在撞击过程中的工作机制.
- 系统地研究关键参数对产生的冲击波形状的影响.
- 开发一个动态模型来预测LCWG冲击脉冲.
主要方法:
- 使用各种LCWG的落下测试机 (DTM) 进行定制的冲击测试.
- 分析了面积比,冲击速度和冲击质量对波形的影响.
- 开发了一种集成几何变形和材料特性的非线性动态模型.
主要成果:
- 在撞击过程中,LCWG的几何从形变为截断的形,局部变形.
- 峰值加速度与撞击速度和质量线性相关,与面积比指数相关.
- 脉冲持续时间以非线性增长的比例增长,不受速度或质量的影响.
结论:
- 开发的非线性动态模型准确地预测了冲击波形状.
- 该模型包含用于冲击测试的关键LCWG参数.
- 这些发现为设计更好的LCWG用于冲击评估提供了基础.
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