基于实时数据投影的动态模态重构方法及其在公路隧道内声场预测中的应用

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中图分类号:0213.6 文献标志码:A 文章编号:1003-5168(2025)12-0070-05

DOI: 10.19968/j.cnki.hnkj.1003-5168.2025.12.013

Dynamic Modal Reconstruction Method Based on Real-time Data Projection and Its Application in Tunnel Acoustic Field Prediction

DONG Zhenlin (Qinghai Provincial Transportation Construction Engineering Cost Station,Xining8171O1,China)

Abstract: [Purposes]To address the unsuitability of existing modal reconstruction methods for predicting non-stationary physical fields with increasing prediction steps,this paper aims to enhance the adaptability of Dynamic Mode Decomposition (DMD) for non-stationary physical field prediction.[Methods] Based on Koopman-mode decomposition and data driven physical field reconstruction,this paper proposes a dynamic modal reconstruction method based on real-time data projection.Its effectiveness has been verified through two cases: strong sound-absorbing walls and highly reflective walls in a tunnel. [Findings] Unlike traditional methods that perform reconstruction using the initial physical field,the dynamic modal reconstruction method based on real-time data projection can effctively eliminate the error accumulation caused by the non-stationary acoustic field by continuously incorporating the latest real - time data for data mapping,thus significantly improving prediction accuracy.The proposed method can be an efficient prediction tool for non-stationary physical fields.[Conclusions] The error-accumulation effect of existing modal reconstruction methods originates from thecontinuous introduction of new information in non-stationary physical field data.Real-time data projection can resolve the erroraccumulation phenomenon.

Keywords: data-driven; non-stationary; acoustic signal; tunnel; dynamic mode decomposition

0 引言

近年来,随着我国公路网络的不断完善,隧道的建设工程数量不断增加。(剩余10252字)

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