基于分布式应变响应的船体结构变形挠度测量方法研究与验证

Research and Validation of the Methods to Measure Ship's Structural Distortion Deflection Based on Distribution Strain Response

分析了结构变形监测的必要性以及本领域的现状,明确了当前存在的理论和技术难点,创新地提出了基于分布式应变测量舰船结构挠度的方法和理论,并进一步进行了详细理论推导。依据舰船典型甲板结构设计数值实验模型,运用商业有限元分析软件PATRAN进行了甲板结构挠度测试方法与精度的数值实验。通过对实验结果的分析、讨论和比较,证明了本方法和理论的正确性和可行性。所测结构变形挠度可用于建立舰船结构健康监测系统、轴系设计、修正舰船航行姿态以及提高武器精度等。

The necessity and current situation in structural distortion deflection was analyzed. The difficul ty of theory and technology was defined. A method and theory was put forward to measure ship＇ s distortion deflection based on the distribution strain response, the related formulas were derived in detail. A model for the numerical experiment was designed according to ship＇ s typical deck structure. And in order to test the method and accuracy, a numerical experiment of measuring the deck＇ s deflection was carried out with the help of commercial software, PATRAN. To prove the possibility and accuracy of the theory, the experi ment result is analyzed, discussed and compared. The structural deflection that we get from the theory can be used to build health monitoring system of ship＇ s structure, design shafting, and revise ship＇ s attitude and increase weapon＇s accuracy.