随机撞击力定位通过加权参考数据库方法实现
Binbin Qiu1,2, Siqi Liu1, Weidong Li3
1School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai, China.
Scientific reports
|December 31, 2024
概括
准确地定位结构上的随机冲击力 (RIF) 是一个挑战. 新的加权参考数据库方法 (WRDM) 通过插值和加权框架提高了RIF定位的准确性.
科学领域:
- 结构力学 结构力学
- 影响力动态的影响力动态
- 工程安全工程安全工程
背景情况:
- 随机冲击力 (RIF) 显著影响结构完整性和安全性.
- 在结构性健康监测中,准确地定位RIF是一个关键但具有挑战性的问题.
研究的目的:
- 引入一种新方法,即加权参考数据库方法 (WRDM),用于准确的RIF本地化.
- 通过解决现有方法的局限性,提高RIF本地化准确性.
主要方法:
- 使用双立方插值在稀疏的数据库中增加参考撞击点密度.
- 开发一个加权的随机冲击本地化框架,采用一个等号距离变量,以提高准确性.
- 扩大WRDM的边界范围,以克服插值区域的限制.
主要成果:
- 在悬浮的矩形板上进行实验验证,证明了WRDM的有效性.
- 实现了平均绝对定位误差为16.67毫米.
- 性能优于以前的方法,包括PRMCSM (21.54毫米) 和混合方法 (20.80毫米).
结论:
- WRDM在准确地定位结构上的随机冲击力方面提供了显著的进步.
- 该方法创新地使用插值和加权框架,提高了定位精度.
- WRDM提供了一种更可靠的方法,以确保在冲击负载下结构完整性和安全性.
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