In‐flight dynamics of volcanic ballistic projectiles

Taddeucci J.; Alatorre‐Ibargüengoitia M. A.; Cruz‐Vázquez O.; Del Bello E.; Scarlato P.; Ricci T.

摘要

Abstract >Centimeter to meter‐sized volcanic ballistic projectiles from explosive eruptions jeopardize people and properties kilometers from the volcano, but they also provide information about the past eruptions. Traditionally, projectile trajectory is modeled using simplified ballistic theory, accounting for gravity and drag forces only and assuming simply shaped projectiles free moving through air. Recently, collisions between projectiles and interactions with plumes are starting to be considered. Besides theory, experimental studies and field mapping have so far dominated volcanic projectile research, with only limited observations. High‐speed, high‐definition imaging now offers a new spatial and temporal scale of observation that we use to illuminate projectile dynamics. In‐flight collisions commonly affect the size, shape, trajectory, and rotation of projectiles according to both projectile nature (ductile bomb versus brittle block) and the location and timing of collisions. These, in turn, are controlled by ejection pulses occurring at the vent. In‐flight tearing and fragmentation characterize large bombs, which often break on landing, both factors concurring to decrease the average grain size of the resulting deposits. Complex rotation and spinning are ubiquitous features of projectiles, and the related Magnus effect may deviate projectile trajectory by tens of degrees. A new relationship is derived, linking projectile velocity and size with the size of the resulting impact crater. Finally, apparent drag coefficient values, obtained for selected projectiles, mostly range from 1 to 7, higher than expected, reflecting complex projectile dynamics. These new perspectives will impact projectile hazard mitigation and the interpretation of projectile deposits from past eruptions, both on Earth and on other planets. </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><Abstract Type =“main”> <title类型=“main”>抽象</ title> >厘米到炸药爆发的米大小的火山弹道射弹危害来自火山的人和属性公里，但他们还提供有关的信息过去的爆发。传统上，使用简化的弹道理论模拟射弹轨迹，仅占重力和阻力，并假设简单地将弹丸自由移动空气。最近，开始考虑射弹和与羽毛的交互之间的碰撞。除了理论上，实验研究和田间映射还具有迄今为止的火山射弹研究，只有有限的观察。高速，高清成像现在提供了我们用于照亮射弹动力学的新空间和时间范围。在飞行中碰撞通常会影响射弹的尺寸，形状，轨迹和何种射弹性（韧性炸弹与脆性块）以及碰撞的位置和时间。又通过在通风口处发生的喷射脉冲来控制这些。在飞行中撕裂和碎片表征大片，这些炸弹通常会在着陆上突破，两种因素会同化降低所得沉积物的平均粒度。复杂的旋转和旋转是射弹的无处不在的特征，并且相关的马格努力效果可能偏离射弹轨迹的几十度。推导出一种新的关系，将弹丸速度和大小与所产生的冲击火山口的尺寸联系起来。最后，对于所选投影的表观拖动系数值，大部分为1到7的范围，高于预期，反映了复杂的射弹动态。这些新的观点将影响射弹危害缓解和对过去爆发的射弹沉积物的解释，无论是在地球和其他行星上。</ p> </摘要> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-26997/'>《Reviews of Geophysics》</a> <b style="margin: 0 2px;">|</b><span>2017年第3期</span><b style="margin: 0 2px;">|</b><span>共44页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Taddeucci J.&option=202" target="_blank" rel="nofollow">Taddeucci J.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Alatorre‐Ibargüengoitia M. A.&option=202" target="_blank" rel="nofollow">Alatorre‐Ibargüengoitia M. A.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Cruz‐Vázquez O.&option=202" target="_blank" rel="nofollow">Cruz‐Vázquez O.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Del Bello E.&option=202" target="_blank" rel="nofollow">Del Bello E.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Scarlato P.&option=202" target="_blank" rel="nofollow">Scarlato P.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Ricci T.&option=202" target="_blank" rel="nofollow">Ricci T.;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>Istituto Nazionale di Geofisica e VulcanologiaRome Italy;</p> <p>Centro de Investigación en Gestión de Riesgo y Cambio ClimáticoUniversidad de Ciencias y Artes de ChiapasTuxtla Gutiérrez Mexico;</p> <p>Centro de Investigación en Gestión de Riesgo y Cambio ClimáticoUniversidad de Ciencias y Artes de ChiapasTuxtla Gutiérrez Mexico;</p> <p>Istituto Nazionale di Geofisica e VulcanologiaRome Italy;</p> <p>Istituto Nazionale di Geofisica e VulcanologiaRome Italy;</p> <p>Istituto Nazionale di Geofisica e VulcanologiaRome Italy;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/163.html" title="地球物理学">地球物理学;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=ballistic&option=203" rel="nofollow">ballistic;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=projectile&option=203" rel="nofollow">projectile;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=drag coefficient&option=203" rel="nofollow">drag coefficient;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=collision&option=203" rel="nofollow">collision;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=fragmentation&option=203" rel="nofollow">fragmentation;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=eruption&option=203" rel="nofollow">eruption;</a> </p> <div class="translation"> 机译：弹道;弹丸;拖动系数;碰撞;碎片;爆发; </div> </li> </ul> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li class="active" >外文文献</li> <li >中文文献</li> <li >专利</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704024065197.html">In‐flight dynamics of volcanic ballistic projectiles</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Taddeucci J.&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Taddeucci J.,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Alatorre‐Ibargüengoitia M. 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href="/journal-cn-56814/" target="_blank" rel="nofollow" class="tuijian_authcolor"> . 仪器仪表学报 </a> </span> <span> . 2016</span><span>,第1期</span> </span> </div> </li> <li> <div> <b>6. </b><a class="enjiyixqcontent" href="/academic-conference-cn_meeting-58273_thesis/020222880703.html">狭缝高速摄影机拍摄弹丸飞行弹道的分析</a> <b>[C]</b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=宋河金&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 宋河金</a> <span> <a href="/conference-cn-58273/" target="_blank" rel="nofollow" class="tuijian_authcolor"> . 中国兵工学会第五届测试技术学术年会 </a> <span> <span> . 1990</span> </span> </div> </li> <li> <div> <b>7. </b><a class="enjiyixqcontent" href="/academic-degree-domestic_mphd_thesis/020313971607.html">基于光幕阵列的变速曲线弹道弹丸飞行参数测量方法研究</a> <b>[A] </b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=田会&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 田会</a> <span> . 2016</span> 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