非线性相似性表征和验证船舶硬板结构在爆炸负载冲击下的动态反应
Dongyan Shi1, Jiuqiang Wang2, Zhikai Wang3
1College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin, 150001, China.
Scientific reports
|July 9, 2024
概括
这项研究建立了一种基于赫斯特指数的相似性方法,用于在水下爆炸的船舶硬板结构. 这种方法可以通过模型测试准确评估船舶活力和抗冲击设计.
科学领域:
- 海军建筑和海洋工程
- 机械工程 机械工程
- 材料科学 材料科学 材料科学
背景情况:
- 船舶结构面临水下爆炸的重大威胁,需要强大的抗冲击能力.
- 评估船舶活力和设计抗冲击能力需要高效和成本效益的方法.
- 非线性冲击反应分析对于理解极端负载下的结构行为至关重要.
研究的目的:
- 为船舶硬板结构开发相似性测试方法,这些结构受到水下爆炸的影响.
- 建立模型测试与实际船舶结构之间的相似性法则.
- 提供一个框架,用Hurst指数从模型数据中预测原型应变信号.
主要方法:
- 对船舶硬板结构进行非线性冲击响应模型测试.
- 使用赫斯特指数对垂直运动的描述.
- 根据古典相似性定律推导出相当的赫斯特指数关系.
- 建立模型和原型之间应变信号的相似性转换.
- 使用同时进行模型和原型水下爆炸试验进行实验验证.
主要成果:
- 基于赫斯特指数的变异信号的验证的相似性转换关系.
- 赫斯特指数在描述随时间推移的结构运动方面表现出的有效性.
- 成功转换和比较模型实验应变信号与原型结果.
- 对赫斯特指数及其对爆炸性冲击负载的相似性转换的模拟和分析.
结论:
- 赫斯特指数提供了一种可靠的指标,用于评估船舶硬板结构在水下爆炸时的相似性.
- 衍生的相似性转换方法准确地预测了模型测试中的原型菌株信号.
- 这项研究为对船舶水下爆炸进行类似的非线性反应实验提供了宝贵的理论和技术支持.
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