基于粒子法的可变边界柔性气缸弹射研究

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摘要为解决现有弹射器红外目标明显、能量不稳定、结构复杂等问题，进一步提升弹射效率、弹射稳定性，本研究在现有压缩空气弹射器的基础上提出一种可自主增长气缸边界的柔性气缸弹射器，实现高压气体在柔性气缸约束下的长距离做功。在显式动力学基础上，建立多工况下的大尺度柔性气缸弹射负载有限元模型，实现基于粒子法模型的大尺度柔性结构弹射负载的流固耦合数值仿真。研究结果表明在充气量一定时，柔性气缸弹射器比压缩空气弹射器弹射速度增加11.7%，火箭最大过载减小71.6%。进一步研究表明，同种织物漏气的主要影响因素为柔性气缸内外压差，针对不同材料漏气，选取三种材料，其中棉纶66C为柔性气缸织物的弹射系统的弹射指标最佳。对比不同环境压力，外界大气压越低，弹射动能越高，70kPa环境压力下，比标准大气环境压力下，动能增加15.8%。

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	杨宝生
	姜毅
	杨哩娜

关键词 ：柔性气缸弹射, 粒子法, 多孔泄露, 流固耦合

Abstract：In order to solve the problems of obvious infrared target, unstable energy and complex structure of the existing ejector, and further improve the ejection efficiency and ejection stability, this study proposes a flexible cylinder ejector that can independently increase the cylinder boundary based on the existing compressed air ejector, so as to realize the long-distance work of high-pressure gas under the constraint of flexible cylinder. On the basis of display dynamics, the finite element model of large-scale flexible cylinder ejection load under multiple working conditions is established, and the fluid-solid coupling numerical simulation of large-scale flexible structure ejection load based on particle method model is realized. The results show that when the inflation rate is constant, the velocity of flexible cylinder ejection is 11.7 % higher than that of compressed air ejection, and the maximum overload of missile is reduced by 71.6 %. Further research shows that the main influencing factors of air leakage of the same fabric are the pressure difference inside and outside. For air leakage of different materials, three materials are selected, among which cotton 66C is the best ejection index of ejection system of flexible cylinder fabric. Compared with different ambient pressure, the lower the ambient pressure is, the higher the ejection kinetic energy is. Under 70 MPa ambient pressure, the kinetic energy increases by 15.8 % compared with the standard atmospheric pressure.

Key words： Flexible cylinder ejection particle method porous leakage fluid-solid coupling

收稿日期: 2022-05-04 出版日期: 2023-05-28

引用本文:

杨宝生，姜毅，杨哩娜. 基于粒子法的可变边界柔性气缸弹射研究[J]. 振动与冲击, 2023, 42(10): 43-50.
YANG Baosheng，JIANG Yi，YANG Lina. Research on flexible cylinder ejection with variable boundary based on corpuscular method. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(10): 43-50.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2023/V42/I10/43

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