基于形态学的极值提取在海工信号处理中的应用  

Application of Extreme Value Extraction Based on Morphology in Marine Signal Processing

作　　者：曾海坤 朱瑞虎[1] 王启明[1] 陈松贵 王宁[1] ZENG Haikun;ZHU Ruihu;WANG Qiming;CHEN Songgui;WANG Ning(College of Coastal,Harbor and Offshore Engineering,Hohai University,Nanjing 210098,China;Tianjin Research Institute of Water Transport Engineering,Tianjin 300456,China)

机构地区：[1]河海大学港口海岸及近海工程学院,南京210098 [2]交通运输部天津水运工程科学研究院,天津300456

出　　处：《船舶工程》2024年第11期169-174,共6页Ship Engineering

基　　金：国家重点研发计划项目(2022YFB3207400);华能集团科技项目(HNKJ23-H18)。

摘　　要：动力响应信号的局部极值提取对循环荷载下海洋工程结构健康诊断具有重要意义。为解决传统局部极值提取方法效率低和适用范围有限等问题,基于数学形态学提出一种可用于复杂海洋工作环境中海工结构动力响应信号局部极值提取方法,利用形态学膨胀算法与探针配合实现对具有强随机性特征的海工结构动力响应信号进行局部极值提取。通过大直径单桩冲刷试验数据分析对算法进行了验证,并基于该方法对单桩动力响应规律进行研究。结果表明:基于形态学的局部极值提取方法能准确提取海工结构响应信号的局部极值,运用该方法分析得到的大直径单桩动力响应统计值可反映结构在波浪作用下的冲刷阶段发展历程。该方法可为海洋工程结构动力响应信号处理和海量监测数据自动化分析提供新手段,也为海工结构桩基础冲刷监测提供了新思路。The extraction of the local extremum from dynamic response signals is crucial for the health diagnosis of marine engineering structures under cyclic loads.However,traditional local extremum extraction methods have limited application scope and low efficiency.To address this issue,a novel method based on mathematical morphology is proposed to extract local extremum in complex marine working environments.By using the morphological expansion algorithm and probe,accurate extraction of local extremum from dynamic response signals with strong randomness characteristics in marine engineering structures has been successfully achieved.The algorithm is validated by analyzing data from scour tests conducted on large diameter single piles,allowing the dynamic response behavior of single piles to be studied using this method.The results show that the proposed morphology-based approach accurately extracts the local extremum from the response signals of marine engineering structures.Furthermore,the statistical analysis of the dynamic responses obtained by this method reflects the evolutionary process of pile structures during scour stages under wave action.This methodology not only provides a new approach for processing dynamic response signals of marine engineering structures and automatic analysis of massive monitoring data,but also offers a new perspective for scour monitoring in marine engineering pile foundations.

关 键 词：形态学 动力响应信号 局部极值提取 海洋工程结构 数据分析 

分 类 号：P75[天文地球—海洋科学] TN911.7[电子电信—通信与信息系统]