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<p>Rectangular cross-section pressure vessels are favored for point-to-point liquid cargo transportation due to their compact structure, stability, and high volumetric efficiency. However, they suffer from insufficient local stiffness, resulting in lower load-bearing capacity compared to circular cross-section pressure vessels. The corrugated sandwich structure offers excellent bending performance, lightweight properties, and ease of forming. This paper proposes and designs a rectangular pressure vessel enhanced with a corrugated sandwich structure. Finite element analysis is employed to study its load-bearing characteristics, and the mechanical model is simplified accordingly. A deviation of 4.55% was found through theoretical calculations, confirming the accuracy of the finite element analysis results. The new pressure vessel design increases volume by 17.2% compared to traditional designs. The ratio of the moment of inertia of the circumferential reinforcement structure (<InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41598_2025_95592_Article_IEq1.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="30" /> </InlineMediaObject> <EquationSource Format="TEX">\(I_{z\;sq}\)</EquationSource> </InlineEquation>) to that of the external corrugated sandwich structure (<InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41598_2025_95592_Article_IEq2.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="32" /> </InlineMediaObject> <EquationSource Format="TEX">\(I_{z\;sd}\)</EquationSource> </InlineEquation>), denoted as <i>Π</i><sub>1</sub>. As the parameter <i>Π</i><sub>1</sub> increases, the average displacement and maximum stress show an increasing trend, stabilizing when <i>Π</i><sub>1</sub> ≥ 1.14. With the increase of <i>Π</i><sub>2</sub>, the average displacement rises, while the maximum stress first increases and then decreases, reaching its minimum at <i>Π</i><sub>2</sub> = 1.55.</p>

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Structural characteristics of corrugated sandwich rectangular pressure vessels

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年3月27日

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  • Lingxue Zhu,
  • Yuan Fang,
  • Yifan Shen,
  • Hongfeng Li,
  • Yitong Wang,
  • Xiaolei Zhu,
  • Xiaofeng Lu

摘要

Rectangular cross-section pressure vessels are favored for point-to-point liquid cargo transportation due to their compact structure, stability, and high volumetric efficiency. However, they suffer from insufficient local stiffness, resulting in lower load-bearing capacity compared to circular cross-section pressure vessels. The corrugated sandwich structure offers excellent bending performance, lightweight properties, and ease of forming. This paper proposes and designs a rectangular pressure vessel enhanced with a corrugated sandwich structure. Finite element analysis is employed to study its load-bearing characteristics, and the mechanical model is simplified accordingly. A deviation of 4.55% was found through theoretical calculations, confirming the accuracy of the finite element analysis results. The new pressure vessel design increases volume by 17.2% compared to traditional designs. The ratio of the moment of inertia of the circumferential reinforcement structure ( \(I_{z\;sq}\) ) to that of the external corrugated sandwich structure ( \(I_{z\;sd}\) ), denoted as Π1. As the parameter Π1 increases, the average displacement and maximum stress show an increasing trend, stabilizing when Π1 ≥ 1.14. With the increase of Π2, the average displacement rises, while the maximum stress first increases and then decreases, reaching its minimum at Π2 = 1.55.