爆破波

This paper studies wavelet method which detects leak fault for"four kinds of pipe"(reheater, superheater, waterwall, economizer) of power plant boilers and also leak fault for liquid metal in model of fast breeder reactor.

8结合实例利用小波分析进行电站"四管爆破"故障信号提取的研究，同时也进行了利用小波分析提取核电站快堆钠回路泄漏故障信号的研究。

Moreover,if the laser scanning speed istoo faster,the organic matter within the coatings may not elininate fully during the laserirradiation period.When the molten pool begin to solidify,the trapped residual organicmatter may burn,carbonize and boil within the cooling pool,which results in trappedbubble defects inside on the surface of the sintered electronic paste film.

由于扫描速度过快，残留有机物在熔池存在时间内不能完全烧蚀气化，在熔池开始冷却凝固时将可能发生有机物蒸气波沸腾-爆破现象，导致浆料膜层内部气泡和表面爆破孔洞缺陷。

The influence of free surface on tunnels is discussed.The influence of blasting vibration on fresh concrete lining is studied. The finite element method is employed to analyze the spatial distribution of temperature and thermal stress of fresh concrete lining, the wave function expansion method is used to study the interaction of blasting seismic wave and the circular tunnel with lining, thenthe safe PPV of fresh concrete lining with different age is decided by taking into account the thermal stress of concrete lining. Using the conformal mapping method, the influence of blasting vibration on the arch tunnel with lining is studied and the safe PPV of concrete lining is deduced under different incident angle.

研究了爆破振动对新浇混凝土衬砌的影响，采用有限元法求出了圆形洞室新浇混凝土衬砌内温度和温度应力在空间上的分布及其随时间的变化，采用波函数展开法求解了爆破地震波与有衬砌圆形洞室的相互作用，获得了考虑新浇混凝土衬砌内温度应力前提下不同龄期的新浇混凝土衬砌的安全振速；利用保角变换研究了爆破振动对直墙拱形有衬砌隧洞的影响，得到了爆破地震波以不同角度入射时混凝土衬砌的安全振速。

The pressure attenuation of stress wave and the effect of blasting load on ground concrete structure in soil and rock blasting were investigated using LS_DYNA procedure in the aspect of mechanical properties of soil and rock, location of the goal and the explosives, as well as the rarefaction waves of air etc.

利用LS_DYNA程序，从岩土本身的力学性能、目标与炸药的位置、空气稀疏波的影响等多个角度出发，研究了岩土爆破中应力波的压力衰减以及爆破对地表混凝土结构物的影响，得到了其中的规律，为建筑结构的防护提供了一些思路与依据。

Based on the characteristics of short-duration and abrupt of blasting vibration signals and according to measured data from a practical blast,the features of energy distribution in blasting seismic signals were studied by means of the wavelet packet analysis,which had high resolvability and localization,and energy distribution of blasting seismic signals on different frequency bands was obtained.

根据爆破地震信号具有持时短、变化快等特点，结合工程爆破地震监测资料，利用小波包良好的时频局部化性质，对爆破地震信号的能量分布特征进行了分析，得到了爆破地震信号不同频带上的能量分布。

The stress propagation feature and effective area of gas drainage by blasting action were analyzed in the soft coal bed with the control holes.

分析了松软煤介质深孔爆破在有控制孔时应力波传播的特点和因爆破作用的抽放影响区域。

According to the Stress Wave Theory on explosive exploding propagating in the rock, it builds up mathematical model of fractural ranges in the rock, and carry out actual calculation and analysis on fractural range of bench shooting in deep-hole.

根据炸药爆炸在岩石中传播的应力波理论，建立岩石爆破破裂范围数学模型，并对深孔梯段爆破破裂范围进行了实行计算分析，计算结果为：混装乳化炸药岩石深孔梯段爆破侧向底部破裂范围为1.9m。

Due to the particularity of the blasting seismic wave ,the paper firstly introduce formation and categories of seismic wave and the way how to gather and pick-up signal of blasting seismic wave.in addtion , it also introduce two ways——frequency spectrum and wavelet theory to dispose and analyse the signal.

鉴于爆破地震波的特殊性，本文首先介绍了爆破地震波的形成和种类，爆破地震波信号的采集和提取以及对采集信号进行处理的两种分析方法——频谱分析和小波理论，接着针对云南小湾水电站的爆破震动测试对爆破地震波的特点以及传播规律进行了归纳和总结，并通过回归分析对经验公式进行了修正。

5The blasting vibration signals are analyzed by time-energy analysis. Identify the time of detonator priming and ascertain reasonable subordinate interval in millisecond delay blasting to decrease blasting vibration and control the damage of blasting. In this paper, wavelet analysis is used to de-noise the blasting vibration signals.

利用基于小波变换的时－能密度法具有的良好的突出被分析信号能量突变的特点，有效地识别微差爆破中各段雷管的起爆时刻，从而确定微差爆破中合理的微差延时，达到降低爆破震动，控制爆破震动危害的目的。

The underwater drilling and blasting was used in drain box excavation based on the details of project.For ensuring the safe of temporary ship lock during blasting excavation and then influencing the fixing and debugging of later equipments,millisecond delay network and bubble curtain were used to reduce the blasting vibration and water shock ,and monitoring the vibration and water shock during construction.

为确保爆破开挖时临时船闸的安全，以免影响到临时船闸的后期设备安装、调试工作，采用毫秒延期起爆网路和气泡帷幕技术降低爆破振动和水中冲击波，并在施工过程中对爆破振动和水击波进行检测。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。