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<p>This paper develops a unified thermo-vibroacoustic analytical framework for VERITy-manufactured laminated composite plates. The formulation encompasses temperature-dependent orthotropic stiffness, nonlinear degradation because of void content, and fluid–structure interaction in both air and water acoustic media. The constitutive equations are formulated using Classical Laminated Plate Theory (CLPT) with thermal corrections and then decomposed modally, together with a receptance-based harmonic response analysis. A temperature-dependent viscoelastic damping evolution law is implemented, whereas an extended mode shape representation for simply supported boundary conditions is developed; extension to clamped configurations is formulated but reserved for future validation. Two new design metrics are presented, namely the <i>Thermo-Acoustic Degradation Index</i> (TADI) and the <i>Thermo-Fluid–Structure Integrity Coefficient</i> (TFSIC), which quantify the interacting effects of thermal softening, void-induced stiffness loss, and acoustic loading on vibroacoustic integrity. A comparative analysis with conventional vacuum infusion laminates has shown that VERITy composites have superior thermo-acoustic resilience due to reduced void content and improved resin fiber uniformity. Within the stated modeling assumptions—including CLPT validity, semi-coupled fluid loading, modal truncation up to (<i>m</i>, <i>n</i>)&#xa0;<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\le \)</EquationSource> <EquationSource Format="MATHML"><math> <mo>≤</mo> </math></EquationSource> </InlineEquation>&#xa0;3, and baffled far-field radiation—the proposed framework provides a benchmarked analytical basis for low-frequency thermo-vibroacoustic estimation of thin orthotropic laminates in aerospace, marine, and noise-critical engineering applications.</p>

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Thermo-vibroacoustic response of orthotropic laminated composite plates with fluid–structure interaction

  • 期刊论文

  • 发表日期：

    2026年7月10日

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  • Neelam Soni,
  • Baij Nath Singh

摘要

This paper develops a unified thermo-vibroacoustic analytical framework for VERITy-manufactured laminated composite plates. The formulation encompasses temperature-dependent orthotropic stiffness, nonlinear degradation because of void content, and fluid–structure interaction in both air and water acoustic media. The constitutive equations are formulated using Classical Laminated Plate Theory (CLPT) with thermal corrections and then decomposed modally, together with a receptance-based harmonic response analysis. A temperature-dependent viscoelastic damping evolution law is implemented, whereas an extended mode shape representation for simply supported boundary conditions is developed; extension to clamped configurations is formulated but reserved for future validation. Two new design metrics are presented, namely the Thermo-Acoustic Degradation Index (TADI) and the Thermo-Fluid–Structure Integrity Coefficient (TFSIC), which quantify the interacting effects of thermal softening, void-induced stiffness loss, and acoustic loading on vibroacoustic integrity. A comparative analysis with conventional vacuum infusion laminates has shown that VERITy composites have superior thermo-acoustic resilience due to reduced void content and improved resin fiber uniformity. Within the stated modeling assumptions—including CLPT validity, semi-coupled fluid loading, modal truncation up to (m, n)  \(\le \) ≤  3, and baffled far-field radiation—the proposed framework provides a benchmarked analytical basis for low-frequency thermo-vibroacoustic estimation of thin orthotropic laminates in aerospace, marine, and noise-critical engineering applications.