本文主要研究内容
作者宁吉彬（2019）在《基于室内模拟的兴安落叶松林飞火引燃试验研究》一文中研究指出：飞火是一种特殊的林火行为,极易受到多种因素影响,具有较大随机性,一旦产生飞火,将给森林火灾的扑救工作带来巨大难度,给扑火人员生命安全带来巨大威胁。飞火一般分为飞火颗粒的形成、飞迁和落地引燃地表可燃物三个连续阶段。本研究从飞火颗粒落地引燃阶段着手,以黑龙江大兴安岭地区典型针叶树种兴安落叶松为研究对象,以林内自然存在的球果、1h时滞和10h时滞小枝3种不同飞火颗粒为火源,构造不同可燃物含水率和压缩比的地表死可燃物床层,基于不同风速下进行不同火源的引燃试验,每种火源进行1 800次引燃试验,共进行5 400次引燃试验。选取相关环境因素、可燃物特征和火源特征等影响因素,经过变量筛选后,以Logistic模型为基础,建立飞火颗粒引燃概率预测模型,并对模型进行分析。结果表明:(1)3种不同飞火颗粒的引燃能力为球果>10h时滞小枝>1h时滞小枝:(2)在实验设计风速范围内,风速与引燃概率正相关;可燃物含水率与引燃概率负相关,但受火源干重影响,在可燃物含水率为40%时,球果和10h时滞小枝引燃发生次数高于可燃物含水率为30%时;受诸多变量影响,床层压缩比与引燃概率之间关系复杂,没有明显的正、负相关性:(3)球果引燃概率最终模型为:XW表示风速(m·s-1);XFD表示火源干重(g);XBM表示可燃物含水率,下同,模型阈值为0.205,预测引燃准确率为83.1%,预测未燃准确率为68.6%,总预测准确率为72.1%;1h时滞小枝引燃概率最终模型为:模型阈值为0.114,预测引燃准确率为79.5%,预测未燃准确率为78.6%,总预测准确率为78.5%;10h时滞小枝引燃概率最终模型为:XFM表示火源含水率,模型阈值为0.193,预测引燃准确率为81.5%,预测未燃准确率为79%,总预测准确率为79.5%。
Abstract
fei huo shi yi chong te shu de lin huo hang wei ,ji yi shou dao duo chong yin su ying xiang ,ju you jiao da sui ji xing ,yi dan chan sheng fei huo ,jiang gei sen lin huo zai de pu jiu gong zuo dai lai ju da nan du ,gei pu huo ren yuan sheng ming an quan dai lai ju da wei xie 。fei huo yi ban fen wei fei huo ke li de xing cheng 、fei qian he la de yin ran de biao ke ran wu san ge lian xu jie duan 。ben yan jiu cong fei huo ke li la de yin ran jie duan zhao shou ,yi hei long jiang da xing an ling de ou dian xing zhen xie shu chong xing an la xie song wei yan jiu dui xiang ,yi lin nei zi ran cun zai de qiu guo 、1hshi zhi he 10hshi zhi xiao zhi 3chong bu tong fei huo ke li wei huo yuan ,gou zao bu tong ke ran wu han shui lv he ya su bi de de biao si ke ran wu chuang ceng ,ji yu bu tong feng su xia jin hang bu tong huo yuan de yin ran shi yan ,mei chong huo yuan jin hang 1 800ci yin ran shi yan ,gong jin hang 5 400ci yin ran shi yan 。shua qu xiang guan huan jing yin su 、ke ran wu te zheng he huo yuan te zheng deng ying xiang yin su ,jing guo bian liang shai shua hou ,yi Logisticmo xing wei ji chu ,jian li fei huo ke li yin ran gai lv yu ce mo xing ,bing dui mo xing jin hang fen xi 。jie guo biao ming :(1)3chong bu tong fei huo ke li de yin ran neng li wei qiu guo >10hshi zhi xiao zhi >1hshi zhi xiao zhi :(2)zai shi yan she ji feng su fan wei nei ,feng su yu yin ran gai lv zheng xiang guan ;ke ran wu han shui lv yu yin ran gai lv fu xiang guan ,dan shou huo yuan gan chong ying xiang ,zai ke ran wu han shui lv wei 40%shi ,qiu guo he 10hshi zhi xiao zhi yin ran fa sheng ci shu gao yu ke ran wu han shui lv wei 30%shi ;shou zhu duo bian liang ying xiang ,chuang ceng ya su bi yu yin ran gai lv zhi jian guan ji fu za ,mei you ming xian de zheng 、fu xiang guan xing :(3)qiu guo yin ran gai lv zui zhong mo xing wei :XWbiao shi feng su (m·s-1);XFDbiao shi huo yuan gan chong (g);XBMbiao shi ke ran wu han shui lv ,xia tong ,mo xing yu zhi wei 0.205,yu ce yin ran zhun que lv wei 83.1%,yu ce wei ran zhun que lv wei 68.6%,zong yu ce zhun que lv wei 72.1%;1hshi zhi xiao zhi yin ran gai lv zui zhong mo xing wei :mo xing yu zhi wei 0.114,yu ce yin ran zhun que lv wei 79.5%,yu ce wei ran zhun que lv wei 78.6%,zong yu ce zhun que lv wei 78.5%;10hshi zhi xiao zhi yin ran gai lv zui zhong mo xing wei :XFMbiao shi huo yuan han shui lv ,mo xing yu zhi wei 0.193,yu ce yin ran zhun que lv wei 81.5%,yu ce wei ran zhun que lv wei 79%,zong yu ce zhun que lv wei 79.5%。
论文参考文献
论文详细介绍
论文作者分别是来自东北林业大学的宁吉彬，发表于刊物东北林业大学2019-11-18论文，是一篇关于飞火论文,飞火颗粒论文,兴安落叶松论文,室内模拟论文,引燃概率论文,东北林业大学2019-11-18论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自东北林业大学2019-11-18论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：飞火论文; 飞火颗粒论文; 兴安落叶松论文; 室内模拟论文; 引燃概率论文; 东北林业大学2019-11-18论文;