摘要
针对弧形拐弯坑道内冲击波衰减规律不清的问题,研究了半径和拐弯角度对弧形坑道中冲击波传播的影响,发现半径和拐弯角度对消波效率的影响有限,且弧形坑道与同角度直接拐弯坑道的消波效率相近,基本均小于7.2%。为提高拐弯坑道对冲击波的衰减效率,提出了以弧形坑道为基础设置扩散室构建弧形扩散坑道的防护新思想,并探讨了扩散比、扩散形式(外侧扩散、内侧扩散和两侧扩散)和冲击波特征参数对弧形扩散坑道消波效率的影响规律。计算结果表明,弧形扩散坑道可大幅提高冲击波的衰减效率,衰减率最高可达55.9%。外侧扩散型弧形坑道的消波效率最高,内侧扩散型和两侧扩散型的消波效率次之,且消波效率随扩散比的提升而不断升高。随着冲击波压力峰值的增大,弧形扩散坑道的消波效率有所提高,可以达到64.4%;继续提升压力峰值时,弧形扩散坑道的消波效率略有下降但基本保持不变;弧形扩散坑道的消波效率随冲击波正压时间的增长而降低,在正压持续时间为100 ms时,消波效率降至25.4%,但随着正压时间的进一步增长,弧形扩散坑道的消波效率几乎保持不变。
In view of the unclear attenuation law of shock wave in curved tunnel is unclear,the influence of radius and turning angle on shock wave propagation in curved tunnel was analyzed.It was found that its influence on the wave dissipation efficiency is limited,and the wave attenuation efficiency of curved tunnel is similar to that of direct turning tunnel with the same angle,which is basically less than 7.2%.In order to improve the wave attenuation efficiency of shock wave in curved tunnel,a new protective idea of constructing arc-shaped diffusion tunnels based on arc-shaped tunnels by setting up diffusion chambers was proposed.The influence laws of diffusion ratio and diffusion forms(inner diffusion,two-side diffusion and outer diffusion)on the wave attenuation efficiency of curved diffusion tunnels were also discussed.The calculation shows that curved diffusion tunnel can greatly improve the wave attenuation efficiency of shock wave,and the wave attenuation efficiency can reach 55.9%.Among them,the outer diffusion curved tunnel has the highest wave attenuation efficiency,followed by the inner diffusion type and the two-sided diffusion type.Moreover,the wave attenuation efficiency increases continuously with the increase of the diffusion ratio.As the peak pressure of the shock wave increases,the wave attenuation efficiency of the curved diffusion tunnel also improves,reaching up to 64.4%.When the peak pressure continues to increase,the wave attenuation efficiency of the curved diffusion tunnel slightly decreases but remains basically unchanged.The wave attenuation efficiency of the curved diffusion tunnel decreases with the increase of the positive pressure duration of the shock wave.When the positive pressure duration is 100 ms,the wave attenuation efficiency drops to 25.4%.However,as the positive pressure duration further increases,the wave attenuation efficiency of the curved diffusion tunnel remains almost unchanged.
作者
程浩
彭永
薛晓光
陆邱
李翔宇
李志斌
CHENG Hao;PENG Yong;XUE Xiaoguang;LU Qiu;LI Xiangyu;LI Zhibin(College of Science,National University of Defense Technology,Changsha 410003,Hunan,China;Unit 63867 of the PLA,Baicheng 137000,Jilin,China;Beijing Institute of Tracking and Telecommunications Technology,Beijing 100094,China)
出处
《高压物理学报》
北大核心
2026年第3期106-116,共11页
Chinese Journal of High Pressure Physics
基金
国家自然科学基金(12372344)。
关键词
弧形坑道
弧形扩散坑道
冲击波
传播规律
消波效率
curved tunnel
curved diffusion tunnel
shock wave
propagation law
wave attenuation efficiency
