卸荷槽对冷却塔拆除爆破的数值模拟研究  

Numerical Simulation Study on the Influence of Unloading Tank for Cooling Tower Blasting Demolition

作　　者：张建华[1] 谌彪 黄刚[1] 周文涛 姜婷婷[1] 罗余祥 ZHANG Jian-hua;CHEN Biao;HUANG Gang;ZHOU Wen-tao;JIANG Ting-ting;LUO Yu-xiang(School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan 430070,China;Northern Blasting Technology Co.,Ltd.,Beijing 100089,China)

机构地区：[1]武汉理工大学资源与环境工程学院,武汉430070 [2]北方爆破科技有限公司,北京100089

出　　处：《爆破》2020年第3期122-128,共7页Blasting

基　　金：青年自然科学基金(NO.51804235);国家重点研发计划(NO.2018YFC0808405);中央高校基本科研业务费专项资金资助(批准号:2019IBV033)。

摘　　要：为了研究卸荷槽对冷却塔拆除爆破的作用及影响。以黔北某发电厂冷却塔为背景,根据冷却塔双曲线薄壁型的结构特点,从力学角度分析冷却塔的倒塌条件和倒塌机理,运用ANSYA/LS-DYNA数值模拟的方法研究卸荷槽在冷却塔拆除爆破过程中所起的作用。分析不同数目卸荷槽下冷却塔的切口形成、闭合、扭曲变形、触底破碎的整个过程,以及不同宽度、不同高度的卸荷槽对冷却塔的倒塌位移、倒塌速度、塌落振动、爆堆宽度的影响。研究结果表明:不同宽度卸荷槽不会改变冷却塔运动趋势;适量的卸荷槽数目和高度能够改变冷却塔倒塌中的运动状态、促进塔体解体、缩短倒塌时间以及降低爆破振动所造成的危害,有效地提高冷却塔的爆破效果。In order to study the effect and influence of the unloading tank on the demolition blasting of the cooling tower,the collapse condition and mechanism are analyzed from the mechanical point of view based on the structural characteristics of the hyperbolic thin wall in a cooling tower of a power plant in northern Guizhou Province.Using ANSYS/LS-DYNA numerical simulation method to study the role of unloading tank in the process of demolition blasting of cooling tower,the whole process of forming,closing,twisting,and touching ground failure of the cooling tower's incision was analyzed with different numbers of unloading tanks,as well as the influence of the unloading tank of different widths and heights on the collapse displacement,collapse speed,collapse vibration and explosion width of the cooling tower.The results show that the unloading tanks of different widths will not change the movement trend of the cooling tower;the appropriate number and height of the unloading tanks can change the movement state of the cooling tower collapse,promote the disintegration of the tower body,shorten the collapse time,reduce the blasting vibration hazard,and effectively improve the blasting effect of the cooling tower.

关 键 词：拆除爆破 双曲线冷却塔 卸荷槽 数值模拟 

分 类 号：TU746.5[建筑科学—建筑技术科学]