惰性气体和水蒸气对长直空间燃气爆炸超压及其振荡的抑制作用

刘洋; 李展; 方秦; 王森佩; 陈力

doi:10.11858/gywlxb.20200654

惰性气体和水蒸气对长直空间燃气爆炸超压及其振荡的抑制作用

doi: 10.11858/gywlxb.20200654

刘洋^1,,
李展^1,*, ,,
方秦¹,
王森佩¹,
陈力²

1.
陆军工程大学爆炸冲击防灾减灾国家重点实验室，江苏南京　210007
2.
东南大学爆炸安全防护教育部工程研究中心，江苏南京　211189

基金项目: 江苏省自然科学基金（BK20190571）；国家自然科学基金（52008392）

详细信息

作者简介:
刘　洋（1996－），男，硕士研究生，主要从事燃气爆炸荷载研究. E-mail：20145035@cqu.edu.cn

通讯作者:
李　展（1990－），男，博士，讲师，主要从事燃气爆炸灾害效应研究. E-mail：lz.9008@163.com

中图分类号: O381; TD712
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出版历程
- 收稿日期: 2020-12-11
- 修回日期: 2021-01-13

Inert Gas and Water Vapor Suppressing Overpressure and Its Oscillation of Gas Explosion in Long Straight Space

LIU Yang^1
,,
LI Zhan^{1,*
, ,},
FANG Qin¹,
WANG Senpei¹,
CHEN Li²

1.
State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact, Army Engineering University of PLA, Nanjing 210007, Jiangsu, China
2.
Engineering Research Center of Safety and Protection of Explosion & Impact of Ministry of Education, Southeast University, Nanjing 211189, Jiangsu, China

摘要

摘要: 长直空间燃气爆炸超压及其振荡将对人员和结构安全产生不利影响。为减轻燃气爆炸危害，基于CFD软件FLACS建立了长直管道空间燃气爆炸数值模型，并对模型进行了验证。利用已验证的数值模型，研究了添加不同体积分数CO₂、N₂和水蒸气的化学当量比CH₄/空气混合气体的爆炸，讨论了惰性气体和水蒸气的体积分数对爆炸超压及其振荡的影响，并对比了3种气体的抑爆效果。结果表明：CO₂、水蒸气和N₂的体积分数每增加10%，密闭管道气体爆炸的最终超压将分别下降81、47、65 kPa，尾端泄爆管道分别下降24、25、20 kPa，3种气体的体积分数分别为25%、26%、30%时，爆炸被完全抑制；CO₂、水蒸气和N₂均能有效抑制爆炸超压的振荡，压力振幅和压力振荡频率均随添加气体体积分数的增加而减小；CO₂对爆炸超压及其振荡的抑制效果最好，水蒸气次之，N₂最弱，这与3种气体的物理特性及其抑爆机理的差异有关。
- 水蒸气 /
- 惰性气体 /
- 燃气爆炸抑制 /
- FLACS /
- 压力振荡
Abstract: The overpressure and its oscillation of gas explosion in long straight space will endanger personnel and structures. In order to reduce the potential hazards, a numerical model of gas explosions in long straight tube was established based on the CFD software FLACS and was verified by using the existing experimental data. Based on the validated numerical models, the suppression of CO₂, N₂ and water vapor on the CH₄/air mixture explosions with stoichiometric concentration was investigated. The influence of the volume fraction of inert gas and water vapor on the explosion overpressure and its oscillation was considered and discussed. It is shown that for every 10% increase in the volume fraction of CO₂, water vapor and N₂, the final overpressure of the gas explosion in the closed tube drops by 81, 47 and 65 kPa, the final overpressure in the end-vented tube decreases by 81, 47 and 65 kPa. When the volume fractions of CO₂, water vapor and N₂ are 25%, 26%, and 30%, respectively, the explosion is completely suppressed. CO₂, water vapor and N₂ can effectively suppress the oscillation of explosive overpressure, both the pressure amplitude and the pressure oscillation frequency decrease with the increase of the volume fraction of added gas. CO₂ has the best suppression effect on explosion overpressure and its oscillation, followed by water vapor, and N₂ is the weakest. This phenomenon is related to the differences in the physical properties of the three gases and the suppression mechanisms.
- water vapor /
- inert gas /
- gas explosion suppression /
- FLACS /
- pressure oscillation

HTML全文

图 1 管道模型及其网格划分

Figure 1. Tube model and its meshing

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图 2 模型验证工况^[38]

Figure 2. Cases of model verification^[38]

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图 3 模型验证（测点1）

Figure 3. Numerical model verification (pressure sensor 1)

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图 4 混合气体体积示意图

Figure 4. Diagram of premixed gas volume

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图 5 不同CO₂体积分数条件下的超压时程曲线

Figure 5. Overpressure-time history curves of CO₂ with different volume fractions

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图 6 最终超压及升压时间随CO₂体积分数的变化

Figure 6. Change of final overpressure and pressure rising time with CO₂ volume fraction

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图 7 不同CO₂体积分数下超压振幅随时间的变化

Figure 7. Variation of overpressure amplitude of different volume fractions of CO₂ with time

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图 8 不同CO₂体积分数下超压振荡频率随时间的变化

Figure 8. Variation of overpressure oscillation frequency of different volume fractions of CO₂ with time

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图 9 不同N₂体积分数条件下的超压时程曲线

Figure 9. Overpressure-time history curves of N₂ with different volume fractions

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图 10 最终超压及升压时间随N₂体积分数的变化

Figure 10. Change of final overpressure and pressure rising time with N₂ volume fraction

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图 11 不同N₂体积分数下超压振幅随时间的变化

Figure 11. Variation of overpressure amplitude of different volume fractions of N₂ with time

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图 12 不同N₂体积分数下超压振荡频率随时间的变化

Figure 12. Variation of overpressure oscillation frequency of different volume fractions of N₂ with time

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图 13 不同水蒸气体积分数条件下的超压时程曲线

Figure 13. Overpressure-time history curves of N₂ with different volume fractions

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图 14 最终超压及升压时间随水蒸气体积分数的变化

Figure 14. Change of final overpressure and pressure rising time with water vapor volume fraction

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图 15 不同水蒸气体积分数下超压振幅随时间的变化

Figure 15. Variation of overpressure amplitude of different volume fractions of water vapor with time

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图 16 不同水蒸气体积分数下超压振荡频率随时间的变化

Figure 16. Variation of overpressure oscillation frequency of different volume fractions of water vapor with time

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图 17 不同CO₂体积分数条件下的超压时程曲线

Figure 17. Overpressure-time history curves of CO₂ with different volume fractions

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图 18 最终超压和升压时间随CO₂体积分数的变化

Figure 18. Change of final overpressure and pressure rising time with CO₂ volume fraction

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图 19 不同CO₂体积分数下超压振幅随时间的变化

Figure 19. Variation of overpressure amplitude of different volume fractions of CO₂ with time

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图 20 不同CO₂体积分数下超压振荡频率随时间的变化

Figure 20. Variation of overpressure oscillation frequency of different volume fractions of CO₂ with time

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图 21 不同N₂体积分数条件下的超压时程曲线

Figure 21. Overpressure-time history curves of N₂ with different volume fractions

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图 22 最终超压及升压时间随N₂体积分数的变化

Figure 22. Change of final overpressure and pressure rising time with N₂ volume fraction

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图 23 不同N₂体积分数下超压振幅随时间的变化

Figure 23. Variation of overpressure amplitude of different volume fractions of N₂ with time

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图 24 不同N₂体积分数下超压振荡频率随时间的变化

Figure 24. Variation of overpressure oscillation frequency of different volume fractions of N₂ with time

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图 25 不同水蒸气体积分数条件下的超压时程曲线

Figure 25. Overpressure-time history curves of water vapor with different volume fractions

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图 26 最终超压及升压时间随水蒸气体积分数的变化

Figure 26. Change of final overpressure and pressure rising time with water vapor volume fraction

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图 27 不同水蒸气体积分数下超压振幅随时间的变化

Figure 27. Variation of overpressure amplitude of different volume fractions of water vapor with time

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图 28 不同水蒸气体积分数下超压振荡频率随时间的变化

Figure 28. Variation of overpressure oscillation frequency of different volume fractions of water vapor with time

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图 29 密闭管道内CO₂、N₂和水蒸气对爆炸的抑制作用对比

Figure 29. Comparison of suppression of CO₂, N₂ and water vapor on the explosion in the closed tube

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图 30 尾端泄爆管道内CO₂、N₂和水蒸气对爆炸的抑制作用对比

Figure 30. Comparison of suppression of CO₂, N₂ and water vapor on the explosion in the end-vented tube

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表 1 添加气体的体积分数（密闭/泄爆）

Table 1. Volume fraction of added gas (closed/end-vented) %　

CO₂ N₂ Water vapor (H₂O) CO₂ N₂ Water vapor (H₂O)

0 0 0 20 25 20
4 5 4 24 30 24
8 10 8 25 31 26
12 15 12 27
16 20 16

下载: 导出CSV

参考文献(41)

[1]	李建国, 郭昭胜, 张永生, 等. 室内燃气爆炸对混凝土结构的破坏及有限元分析 [J]. 消防科学与技术, 2018, 37(4): 563–566. doi: 10.3969/j.issn.1009-0029.2018.04.041 LI J G, GUO Z S, ZHANG Y S, et al. The concrete structural failure caused by internal gas explosion and its finite element analysis [J]. Fire Science and Technology, 2018, 37(4): 563–566. doi: 10.3969/j.issn.1009-0029.2018.04.041
[2]	闫秋实, 刘晶波, 伍俊. 典型地铁车站内爆炸致人员伤亡区域的预测研究 [J]. 工程力学, 2012, 29(2): 81–88. YAN Q S, LIU J B, WU J. Estimation of casualty areas in subway station subjected to terrorist bomb [J]. Engineering Mechanics, 2012, 29(2): 81–88.
[3]	王波, 杜扬, 齐圣, 等. 油气爆炸在细长密闭管道内的振荡传播特性 [J]. 振动与冲击, 2017, 36(17): 97–103, 126. WANG B, DU Y, QI S, et al. Oscillation propagation characteristics of gasoline-air mixture explosion in elongated closed tubes [J]. Journal of Vibration and Shock, 2017, 36(17): 97–103, 126.
[4]	XIAO H H, MAKAROV D, SUN J H, et al. Experimental and numerical investigation of premixed flame propagation with distorted tulip shape in a closed duct [J]. Combustion and Flame, 2012, 159(4): 1523–1538.
[5]	LI H W, GUO J, YANG F Q, et al. Explosion venting of hydrogen-air mixtures from a duct to a vented vessel [J]. International Journal of Hydrogen Energy, 2018, 43(24): 11307–11313.
[6]	YAO Z F, DENG H X, ZHAO W L, et al. Experimental study on explosion characteristics of premixed syngas/air mixture with different ignition positions and opening ratios [J]. Fuel, 2020, 279: 118426.
[7]	LV P F, ZHANG J X, JU M H, et al. Influence of branch pipes on the deflagration characteristics of methane in confined space [J]. Process Safety Progress, 2020, 40(1): e12152.
[8]	李国庆, 杜扬, 王波, 等. 点火位置对管道内油气泄压爆炸超压特性影响 [J]. 振动与冲击, 2017, 36(24): 204–212. LI G Q, DU Y, WANG B, et al. Effects of ignition position on overpressure characteristics of vented gasoline-air mixture explosion in a pipe [J]. Journal of Vibration and Shock, 2017, 36(24): 204–212.
[9]	PHYLAKTOU H, ANDREWS G E. Gas explosions in long closed vessels [J]. Combustion Science and Technology, 1991, 77(1/2/3): 27–39.
[10]	郑立刚, 朱小超, 于水军, 等. 浓度和点火位置对氢气-空气预混气爆燃特性影响 [J]. 化工学报, 2019, 70(1): 408–416. ZHENG L G, ZHU X C, YU S J, et al. Effect of concentration and ignition position on characteristics of premixed hydrogen-air deflagration [J]. CIESC Journal, 2019, 70(1): 408–416.
[11]	SEARBY G. Acoustic instability in premixed flames [J]. Combustion Science and Technology, 1992, 81(4/5/6): 221–231.
[12]	XING H D, XU Q M, SONG X Z, et al. The effects of vent area and ignition position on pressure oscillations in a large L/D ratio duct [J]. Process Safety and Environmental Protection, 2020, 135: 166–170.
[13]	朱传杰, 林柏泉, 江丙友, 等. 瓦斯爆炸在封闭管道内冲击振荡特征的数值模拟 [J]. 振动与冲击, 2012, 31(16): 8–12, 17. doi: 10.3969/j.issn.1000-3835.2012.16.002 ZHU C J, LIN B Q, JIANG B Y, et al. Numerical simulation on oscillation and shock of gas explosion in a closed end pipe [J]. Journal of Vibration and Shock, 2012, 31(16): 8–12, 17. doi: 10.3969/j.issn.1000-3835.2012.16.002
[14]	ZHU C J, LIN B Q, JIANG B Y, et al. Numerical simulation of blast wave oscillation effects on a premixed methane/air explosion in closed-end ducts [J]. Journal of Loss Prevention in the Process Industries, 2013, 26(4): 851–861.
[15]	韦世豪, 杜扬, 王世茂, 等. 不同形状受限空间内油气爆燃特性的实验研究 [J]. 中国安全生产科学技术, 2017, 13(5): 41–47. WEI S H, DU Y, WANG S M, et al. Experimental study on deflagration characteristics of gasoline-air mixture in confined space with different shapes [J]. Journal of Safety Science and Technology, 2017, 13(5): 41–47.
[16]	韦世豪, 杜扬, 王世茂, 等. 非均匀容积式受限空间油气爆炸超压与火焰特征 [J]. 后勤工程学院学报, 2017, 33(4): 30–36. doi: 10.3969/j.issn.1672-7843.2017.04.006 WEI S H, DU Y, WANG S M, et al. Overpressure and flame characteristics of gasoline-vapor explosion in the non-uniform volumetric confined space [J]. Journal of Logistical Engineering University, 2017, 33(4): 30–36. doi: 10.3969/j.issn.1672-7843.2017.04.006
[17]	李毅. 管道中氢-空和甲烷-空预混火焰传播与压力振荡研究 [D]. 焦作: 河南理工大学, 2015.
[18]	路长, 李毅, 潘荣锟. 管道氢气-空气预混气体爆炸特征的试验研究 [J]. 安全与环境学报, 2016, 16(3): 38–42. LU C, LI Y, PAN R K, et al. Experimental study on explosion tendency of hydrogen-air premixed gases in the duct [J]. Journal of Safety and Environment, 2016, 16(3): 38–42.
[19]	王亚磊, 郑立刚, 于水军, 等. 约束端面对管内甲烷爆炸特性的影响 [J]. 爆炸与冲击, 2019, 39(9): 139–148. WANG Y L, ZHENG L G, YU S J, et al. Effect of vented end faces on characteristics of methane explosion in duct [J]. Explosion and Shock Waves, 2019, 39(9): 139–148.
[20]	WANG Z R, NI L, LIU X, et al. Effects of N₂/CO₂ on explosion characteristics of methane and air mixture [J]. Journal of Loss Prevention in the Process Industries, 2014, 31: 10–15. doi: 10.1016/j.jlp.2014.06.004
[21]	LI M, XIAO Y, DENG J, et al. Effect of CO₂ on explosion limits of flammable gases in goafs [J]. Mining Science and Technology, 2010, 20(2): 193–197.
[22]	LI M H, XU J C, WANG C J, et al. Thermal and kinetics mechanism of explosion mitigation of methane-air mixture by N₂/CO₂ in a closed compartment [J]. Fuel, 2019, 255(1): 115747.
[23]	张迎新, 吴强, 刘传海, 等. 惰性气体N₂/CO₂抑制瓦斯爆炸实验研究 [J]. 爆炸与冲击, 2017, 37(5): 906–912. ZHANG Y X, WU Q, LIU C H, et al. Experimental study on coal mine gas explosion suppression with inert gas N₂/CO₂ [J]. Explosion and Shock Waves, 2017, 37(5): 906–912.
[24]	李凌飞. 甲烷爆炸特性及其抑爆技术研究[D]. 太原: 中北大学, 2012.
[25]	任韶然. 惰性及特种可燃气体对甲烷爆炸特性的影响实验及分析 [J]. 天然气工业, 2013, 33(10): 110–115. doi: 10.3787/j.issn.1000-0976.2013.10.019 REN S R. An experimental study of effects of insert and special flammable gases on methane’s explosion characteristics [J]. Natural Gas Industry, 2013, 33(10): 110–115. doi: 10.3787/j.issn.1000-0976.2013.10.019
[26]	王华, 葛岭梅, 邓军. 惰性气体抑制矿井瓦斯爆炸的实验研究 [J]. 矿业安全与环保, 2008, 35(1): 4–7. doi: 10.3969/j.issn.1008-4495.2008.01.002 WANG H, GE L M, DENG J. Experimental study of using inert gas to suppress mine gas explosion [J]. Mining Safety & Environmental Protection, 2008, 35(1): 4–7. doi: 10.3969/j.issn.1008-4495.2008.01.002
[27]	李成兵. N₂/CO₂/H₂O抑制甲烷爆炸化学动力学机理分析 [J]. 中国安全科学学报, 2010, 20(8): 88–92. doi: 10.3969/j.issn.1003-3033.2010.08.014 LI C B. Chemical kinetics mechanism analysis of N₂/CO₂/H₂O suppressing methane explosion [J]. China Safety Science Journal, 2010, 20(8): 88–92. doi: 10.3969/j.issn.1003-3033.2010.08.014
[28]	XIE Y L, WANG J H, ZHANG M, et al. Experimental and numerical study on laminar flame characteristics of methane oxy-fuel mixtures highly diluted with CO₂ [J]. Energy and Fuels, 2013, 27: 6231–6237. doi: 10.1021/ef401220h
[29]	秦文茜, 王喜世, 谷睿, 等. 超细水雾作用下瓦斯的爆炸压力及升压速率 [J]. 燃烧科学与技术, 2012, 18(1): 90–95. QIN W Q, WANG X S, GU R, et al. Methane explosion overpressure and overpressure rise rate with suppression by ultra-fine water mist [J]. Journal of Combustion Science and Technology, 2012, 18(1): 90–95.
[30]	康泉胜, 李振明, 王睿, 等. 超细水雾对管内丙烷爆炸火焰抑制效果的试验研究 [J]. 安全与环境学报, 2015, 15(6): 111–114. KANG Q S, LI Z M, WANG R, et al. Experimental study on the inhibition effects of the ultra-fine water mist on the propane explosion flame in the tube [J]. Journal of Safety and Environment, 2015, 15(6): 111–114.
[31]	高旭亮. 超细水雾抑制甲烷爆炸实验与数值模拟 [D]. 大连: 大连理工大学, 2014.
[32]	刘丹, 司荣军, 李润之. 环境湿度对瓦斯爆炸特性的影响 [J]. 高压物理学报, 2015, 29(4): 307–312. doi: 10.11858/gywlxb.2015.04.011 LIU D, SI R J, LI R Z. Ambient humidity on explosion characteristics of methane/air mixture [J]. Chinese Journal of High Pressure Physics, 2015, 29(4): 307–312. doi: 10.11858/gywlxb.2015.04.011
[33]	GEXCON A S. FLACS V10. 8 user’s manual [Z]. Bergen, Norway: GEXCON AS, 2017.
[34]	LAUNDER B E, SPALDING D B. The numerical computation of turbulent flows [J]. Computer Methods in Applied Mechanics and Engineering, 1974, 3(2): 269–289.
[35]	陈晓坤, 丁园月, 程方明, 等. CO₂对矿井多组分可燃性气体抑爆特性的影响 [J]. 煤炭科学技术, 2015, 43(3): 43–47. CHEN X K, DING Y Y, CHENG F M, et al. Influence of CO₂ on explosion suppression characteristics of multicomponent flammable gas in coal mine [J]. Coal Science and Technology, 2015, 43(3): 43–47.
[36]	罗振敏, 王涛, 程方明, 等. 小尺寸管道内二氧化碳抑制甲烷爆炸效果的实验及数值模拟 [J]. 爆炸与冲击, 2015, 35(3): 393–400. doi: 10.11883/1001-1455-(2015)03-0393-08 LUO Z M, WANG T, CHENG F M, et al. Experimental and numerical studies on the suppression of methane explosion using CO₂ in a mini vessel [J]. Explosion and Shock Waves, 2015, 35(3): 393–400. doi: 10.11883/1001-1455-(2015)03-0393-08
[37]	张印, 赵东风, 刘义. 基于FLACS的CH₄/CO₂/air混合气爆炸参数分析 [J]. 中国安全生产科学技术, 2016, 12(9): 36–40. ZHANG Y, ZHAO D F, LIU Y. Analysis on explosion parameters of CH₄/CO₂/air mixed gas based on FLACS [J]. Journal of Safety Science and Technology, 2016, 12(9): 36–40.
[38]	LI Z, CHEN L, YAN H C, et al. Gas explosions of methane-air mixtures in a large-scale tube [J]. Fuel, 2021, 285: 119239.
[39]	杨春丽, 刘艳, 胡玢, 等. 氮气和水蒸气对瓦斯爆炸基元反应的影响及抑爆机理分析 [J]. 高压物理学报, 2017, 31(3): 301–308. doi: 10.11858/gywlxb.2017.03.012 YANG C L, LIU Y, HU F, et al. Effect of nitrogen an water vapor on methane-air mixture explosion elementary reaction suppression mechanism [J]. Chinese Journal of High Pressure Physics, 2017, 31(3): 301–308. doi: 10.11858/gywlxb.2017.03.012
[40]	袁渭兰, 吕卫民, 贾忠湖. 气体动力学[M]. 北京: 科学出版社, 2013: 55.
[41]	卓士创, 董慎行. 弹簧振子在定常干摩擦阻尼作用下的振动 [J]. 大学物理, 2001(6): 17–21, 33. doi: 10.3969/j.issn.1000-0712.2001.06.005 ZHUO S C, DONG S X. The oscillation of a spring oscillator under constant dry frictional damping [J]. College Physics, 2001(6): 17–21, 33. doi: 10.3969/j.issn.1000-0712.2001.06.005