Faculty of Civil and Environmental Engineering, Gdansk University of Technology, 80-233 Gdańsk, Poland.
Sensors (Basel). 2020 Mar 21;20(6):1749. doi: 10.3390/s20061749.
When any problems related to civil engineering structures appear, identifying the issue through the usage of only one measuring method is difficult. Therefore, comprehensive tests are required to identify the main source. The strains and displacement measurements, as well as modal identification, are widely used in the nondestructive testing of structures. However, measurements are usually carried out at several points and confirm or exclude only one of many potential causes of the problem. The main aim of this paper is to identify the causes of miter gates' excessive vibration. The research includes displacement measurements using a tachometer and a laser scanner, acceleration measurements connected with modal analysis, and calculations with the finite element method (FEM) model. The numerical model underwent verification regarding test results. Particular attention was paid to evaluate the practical use of a laser scanner for diagnosing miter gates. Unlike classical methods, it measures many points. The analysis eliminated a number of potential causes of excessive vibration and highlighted the field of excessive deformation. The identified anomaly could be associated with bearings' misalignment after closing the door. This construction part should be subjected to further research using classical methods. The laser scanning has been proven to be a method that can only generally present the deformation of the structure.
当出现与土木工程结构相关的任何问题时，仅使用一种测量方法很难确定问题所在。因此，需要进行综合测试以确定主要原因。应变和位移测量以及模态识别广泛应用于结构的无损检测中。然而，测量通常在几个点进行，只能确认或排除问题的许多潜在原因之一。本文的主要目的是确定斜接门过度振动的原因。研究包括使用转速计和激光扫描仪进行位移测量、与模态分析相关的加速度测量以及使用有限元法 (FEM) 模型进行计算。数值模型经过了对测试结果的验证。特别注意评估激光扫描仪在诊断斜接门方面的实际用途。与传统方法不同，它可以测量多个点。分析排除了过度振动的许多潜在原因，并突出了过度变形的领域。识别出的异常可能与关门后轴承不对中有关。该结构部分应使用传统方法进一步研究。激光扫描已被证明是一种只能大致表示结构变形的方法。
