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Hybrid analytic-FEM approach for dynamic response analysis of air-cushion vehicle skirts

机译：空腹车裙的动态响应分析混合分析 - 有限元方法

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摘要

Focused on the assessment method for dynamic behavior of the skirts of an air cushion vehicle (ACV), this paper proposes a hybrid analytic-FEM approach, within which the self-developed subroutine considers the transient skirt-water contacting force through suggested semianalytical formula based on the empirical results from CFD simulations of the equivalent flatplate model. The dynamic explicit algorithm of FEM is adopted to solve the large deformation problem of flexible skirts. The validity of the approach has been confirmed by comparing with previous numerical results as well as published experimental results of steady seal deformation tests at University of Michigan. Afterward, more simulations for demonstration cases are carried out to study the complex dynamic response of the skirts under different skirt-water contacting conditions. The proposed method can obtain more reliable results than traditional analytical method and be more efficient than fluid-structure interaction simulations, thus providing a practical balanced approach aiming at the dynamic response analysis for whole skirts and contributing to the skirts dynamics performance assessment of an ACV.
机译：本文专注于对气垫车辆裙的动态行为的评估方法（ACV），提出了一种混合分析 - FEM方法，在此内，通过所提出的半阳性公式，自发育的子程序将瞬态裙型 - 水接触力置于其中的混合分析 - FEM方法关于等效箱板模型的CFD模拟的经验结果。采用动态显式算法来解决柔性裙部的大变形问题。通过与先前的数值结果相比，已经证实了该方法的有效性，以及密歇根大学的稳定密封变形试验的公开实验结果。之后，进行了更多的示范病例模拟，以研究裙部在不同的裙边 - 水接触条件下的复杂动力响应。该方法可以获得比传统的分析方法更可靠的结果，并且比流体结构相互作用模拟更有效，从而提供了一种实用的平衡方法，旨在针对整个裙子的动态响应分析，并为裙子进行ACV的动力学性能评估。

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