Dynamic-Effect Hydraulic Resistance Model and Validation for Recoil Mechanisms

SUN Kunpeng; XU Yadong; MIAO Wei; LIANG Chen

doi:10.12382/bgxb.2025.0912

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Dynamic-Effect Hydraulic Resistance Model and Validation for Recoil Mechanisms

更新时间：2026-03-02

- Dynamic-Effect Hydraulic Resistance Model and Validation for Recoil Mechanisms
- Acta Armamentarii (2026)
- 作者机构：
  
  南京理工大学机械工程学院,江苏,南京,210094
- 作者简介：
- 基金信息：
- DOI：10.12382/bgxb.2025.0912
  CLC： TJ301
- Received：13 October 2025，
  
  Online First：02 March 2026，
- 稿件说明：
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孙鵾鹏，徐亚栋，缪伟，等. 考虑动力效应的制退机液压阻力计算模型及验证[J/OL]. 兵工学报, 2026(2026-03-02). https://doi.org/10.12382/bgxb.2025.0912.

SUN K P, XU Y D, MIAO W, et al. Dynamic-effect hydraulic resistance model and validation for recoil mechanisms[J/OL]. Acta Armamentarii, 2026(2026-03-02). https://doi.org/10.12382/bgxb.2025.0912. (in Chinese)
孙鵾鹏，徐亚栋，缪伟，等. 考虑动力效应的制退机液压阻力计算模型及验证[J/OL]. 兵工学报, 2026(2026-03-02). https://doi.org/10.12382/bgxb.2025.0912. DOI：

SUN K P, XU Y D, MIAO W, et al. Dynamic-effect hydraulic resistance model and validation for recoil mechanisms[J/OL]. Acta Armamentarii, 2026(2026-03-02). https://doi.org/10.12382/bgxb.2025.0912. (in Chinese) DOI：

摘要

传统制退机液压阻力计算方法因忽略流体动力效应，直接采用制退机1腔压力计算，存在系统性误差。为此，本文基于动量定理建立了考虑流体动力效应的液压阻力理论计算模型。为验证模型，首先构建了制退机三维计算流体力学（Computational Fluid Dynamics，CFD）模型，并通过实弹射击试验数据对其进行了校验。随后，利用一组CFD结果修正理论模型，其余数据进行独立验证。结果表明，理论计算结果与CFD数据高度一致，决定系数R2均大于0.995，归一化误差主要在±5%以内。进一步设计并实施了液压阻力直接测量试验，以直观量化动力效应对液压阻力计算的影响。研究结果表明，传统方法在后坐中期阶段会系统性高估液压阻力，其最大偏差可达21.5%。所提出的理论计算模型能够有效消除动力效应引起的计算误差，并可修正关键结构参数，为发射动力学分析与制退机设计提供了更可靠的液压阻力计算方法。

Abstract

Conventional hydraulic resistance calculation methods for recoil brakes introduce systematic errors by neglecting fluid dynamic effects and directly using the pressure in Chamber 1 for resistance evaluation. To address this issue

a theoretical calculation model incorporating fluid dynamic effects is developed based on the momentum theorem.To validate the proposed model

a three-dimensional computational fluid dynamics (CFD) model of the recoil brake is first established and calibrated using live-fire experimental data. Subsequently

one set of CFD results is employed to calibrate the theoretical model

while the remaining data are used for independent validation. The results demonstrate excellent agreement between the theoretical predictions and CFD data

with coefficients of determination R² exceeding 0.995and normalized errors mainly within ±5%.Furthermore

a direct hydraulic resistance measurement experiment is designed and conducted to quantitatively assess the influence of dynamic effects on hydraulic resistance calculations. The results indicate that the conventional method systematically overestimates the hydraulic resistance during the mid-recoil stage

with a maximum deviation of up to 21.5%. The proposed theoretical model effectively eliminates the errors induced by dynamic effects and enables the correction of key structural parameters

providing a more reliable hydraulic resistance calculation approach for firing dynamics analysis and recoil brake design.

关键词

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references

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