泄爆板开启规律及对室内爆燃压力的影响

建立各类泄爆板运动方程,确定室内气体的有效泄流面积.基于热力学和空气动力学原理,分析可燃性气体混合物室内爆燃泄放过程.考虑泄爆板开启方式,提出了室内爆燃压力的计算方法,运用已有实验数据验证其有效性.研究在立方体爆室和球形爆室外墙及屋面安装各类泄爆板时,室内爆燃压力的变化过程,结果表明,泄爆板转动合页位于外墙泄压口侧或下边缘时,泄压效果较好.与立方体爆室相比,球形爆室内最大泄放压力较高,但爆燃持续时间较短.     

Penetration depth for yaw-inducing bursting layer impacted by projectile

In order to accurately estimate the anti-penetration capacity of yaw-inducing bursting layer with irregular barriers on surface impacted by projectile, the theoretical model of attack angle and angular velocity for projectile impacting on irregular barrier was achieved according to the macroscopic relation of contact force versus contact time, in which the main factors such as the relative geometrical characteristics of projectile and irregular barrier, material property and impact velocity of projectile influencing on yaw-inducing effectiveness were considered. On the basis of considering synthetically the influences of attack angle, impact velocity, impact angle of projectile and uncontrolled free surface of target, the theoretical formulation of penetration depth for bursting layer with irregular barriers on surface impacted by projectile was presented by expressing the stress of an optional point on the nose of projectile according to the relation of stress versus velocity. The theoretical results indicate that in the case of oblique impact embodying effect of attack angle, the penetration depth is reduced with the increase of impact angle, attack angle or angular velocity, and penetration trajectory is also deflected obviously. The effectiveness of angular velocity influencing on penetration depth is increased with impact velocity increasing. The theoretical results are in good agreement with test data for low impact velocity.     

扬子石化公司粉煤灰碾压地基研究及 应用简介

扬子石化公司粉煤灰碾压地基研究及应用简介蔡钟业，徐小壮，王明洋（工程兵工程学院）１重要性、先进性、创造性粉煤灰的大规模综合利用是我国一直未解决的棘手问题，目前，全国积存量已达１２亿ｍ￣３，亟待处理，国务院１９９１年专门批转国家经委《关于开展资源综合利...     

积极探索现代营房工程项目管理新模式

结合多年组织部队现代营房建设工程项目管理的工作,就军队现代营房建设工程监理与项目管理一体化服务的运行模式、主要做法等做了介绍,并浅谈了几点体会。     

基于遗传算法的工厂夜间巡逻路线优化问题研究

在建立巡逻路线优化模型的基础上,设计了一种求解有权重路径的遗传算法;并构造了特殊的染色体编码规则和交叉、变异的处理方法,最后,进行了算法的比较实验和结果分析,以验证算法的可行性和有效性。     

施工招投标风险应对措施的探讨和应用

文章探讨了当前施工招投标过程中存在的有关风险,归纳出4种风险应对的有关措施,并应用实例进行论证。     

某工程山体滑坡机理的地质分析

通过对地质环境背景条件、地质灾害类型及其危害性调查，对评价区的岩体结构面进行统计对该滑坡机理进行了地质分析。     

边坡稳定剪破面传递分析法

对边坡稳定剪破面传递法原理进行了阐述,以此建立了剪破面传递用于边坡支护工程计算的方法,并用该计算方法应用到工程中,取得了成功.     

线型药型罩材料及其结构参数对成形性能影响的数值研究

采用正交优化的方法,对某线型聚能装药切割器装药的主要参数进行优化设计,并利用ANSYS/LS-DYNA软件对各方案进行了数值模拟,对于同一正交优化表设计的方案采用不同的罩材进行对比计算,获得了各自的最佳参数组合,经分析得到了最佳的参数方案,达到了参数优化的目的。