Dynamic-effect-based Hydraulic Resistance Model and Validation for Recoil Brake

SUN Kunpeng; XU Yadong; MIAO Wei; LIANG Chen

doi:10.12382/bgxb.2025.0912

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Dynamic-effect-based Hydraulic Resistance Model and Validation for Recoil Brake

更新时间：2026-07-06

- Dynamic-effect-based Hydraulic Resistance Model and Validation for Recoil Brake
- Acta Armamentarii Vol. 47, Issue 6, Pages: 250912(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，
  
  Published：2026-06
- 稿件说明：
移动端阅览
SUN Kunpeng, XU Yadong, MIAO Wei, et al. Dynamic-effect-based Hydraulic Resistance Model and Validation for Recoil Brake[J]. Acta Armamentarii, 2026, 47(6): 250912.
DOI：

SUN Kunpeng, XU Yadong, MIAO Wei, et al. Dynamic-effect-based Hydraulic Resistance Model and Validation for Recoil Brake[J]. Acta Armamentarii, 2026, 47(6): 250912. DOI： 10.12382/bgxb.2025.0912.

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，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，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校验。利用一组CFD结果修正理论模型，其余试验数据进行独立验证。进一步设计并实施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：制退机压力理论计算结果与CFD数据高度一致，决定系数

均大于0.995，归一化误差主要在± 5%以内；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

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

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

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

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

and the remaining data are used for independent validation. The effect of power efficiency on the calculation of hydraulic resistance is visually quantified through Further design and direct measurement tests of hydraulic resistance. The results demonstrate that the theoretical calculation results of pressure in the recoil brake are highly consistent with CFD data. The coefficient of determination R

is larger than 0.995

and the normalized errors are 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 calculation 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.

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references

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