The Research of Engineering Application of Transmission Loss for Longitudinal Wave of an Infinite Rod with a Blocked Mass 阻隔质量对杆类结构纵波隔离的工程应用研究
This paper discusses the performance of longitudinal vibration transducers with a front impedance matching means and a rear impedance matching means, which are placed between a ceramic material and a front mass and a rear mass respectively. 文章论述了在压电陶瓷材料与前质量块之间以及压电陶瓷材料与后质量块之间分别放置了前机械阻抗匹配器和后机械阻抗匹配器的纵向振动换能器的特性。
Reducing the mechanical force of track and bridge, preventing the track from accumulating longitudinal force due to track creeping are the key techniques for the design of continuously welded rail ( CWR) on steep gradient viaduct with small radius in urban mass transit. 减小轨道、桥梁受力,防止轨道因爬行而积聚纵向力,是城市轨道交通中小半径大坡道高架桥地段无缝线路设计的技术关键。
Longitudinal study on schistosomiasis control in lake regions by mass chemotherapy combined with health education 全民化疗结合健康教育控制湖区血吸虫病效果的纵向研究
The mineralized pegmatite dykes are mostly controlled by NEE-striked longitudinal joints and lie in the marginal facies of Mufu mountain rocks mass. 矿化伟晶岩墙大多受NEE向纵向节理控制,并位于幕阜山岩体的边缘。
This paper presents an analytical method that can calculate the natural properties of torsional and longitudinal vibration of an engine crankshaft in continuous mass system. Taking a six-cylinder diesel engine as an example, a continuous mass model of the crankshaft is set up. 提出了一种曲轴轴系扭振和纵振的弹性连续体计算方法,并以一台直列6缸柴油机曲轴为例,建立了扭振和纵振的连续分布系统模型。
The longitudinal vibration of rod is one of the topics for a continuous system, that has distributed mass, distributed elasticity and distributed damping. 杆的纵向振动是连续系统的内容,一个连续系统具有分布质量、分布弹性、分布阻尼。
All transverse joints are sealed with water stop and all longitudinal joints are grouted after the concrete mass gets cooled to a certain temperature to achieve a monolithic section. 为此,横缝须设置止水,纵缝则待坝体冷却后灌浆,将柱状坝块连成整体。
Estimating the Length of Longitudinal Sonic Amplitude Transformer with Additional Mass 有附加质量时纵振动超声变幅杆的长度估算
The longitudinal dispersion model and longitudinal dispersion coefficient of turbulent mass transfer in mine tunnel 井巷紊流传质过程的纵向弥散模型及纵向弥散系数
This paper analyses the fact that when the longitudinal wave velocity of rock Vpr is tested by sonic method and the longitudinal wave velocity of rock mass Vpm tested by seismic method, the irrationality exists in the integrity coefficient of rock mass K. 本文分析了当岩石纵波速度V(pr)用声波法测试,岩体纵波速度V(pm)用地震法测试时,岩体完整性系数K存在着不合理性,并提出了修改方法。
The influence of the clearance between the longitudinal weld seams of the zone plate on the shrinkage mass of the diameter was discussed, the relation between the average clearance of the installation and the total shrinkage mass of the diameter was derived. 对带板纵焊缝间隙影响直径收缩量进行了探讨,得出了组对平均间隙与直径总收缩量的关系。
This paper calculated the resonant length of longitudinal sonic ampli-tude transformer with additional mass ( the tool) in supersonic vibration cutting. 本文对超声振动切削中有附加质量(刀具)的纵振动变幅杆的共振长度进行了理论计算。
After presenting latitudinal normal density hypotheses and latitudinal gravity model of plate motion, we, in this paper, proposed the definitions of latitudinal gravity and longitudinal gravity, as well as dynamic conditions and mass limit conditions of Earth gravity for plate motion. 继纬向正常密度假说和板块运动纬向重力模式提出之后,本文给出了纬向重力和经向重力的定义,提出了板块运动在地球重力学方面的动力学条件和质量极限的概念;
Cross-sectional and longitudinal associations between TV viewing and girls 'body mass index, overweight status, and percentage of body fat 观看电视与女童体重指数、超重状况及体脂百分数的横断面及纵向关系
Based on the Euler-Bernoulli's Theory of the Beam and the differential equation for the longitudinal vibration of the bar, mathematic models in the motional elasticity dynamics of planar mechanical linkage that takes its mass distribution into account are established. 本文根据Eular-Bernolli梁理论及杆的纵向振动微分方程,提出了平面连杆机构计入分布质量的运动弹性动力学的数学模型。
The purpose of this study is to approach the longitudinal change and characteristics of adults 'physique, analyzes the law existent in it, instruct adults how to carry out body-building and lays down the foundation of various quantized index to construct mass service system. 本文探讨了苏南地区成年人体质的纵向发展变化及特点,分析其中存在的规律,指导成年人进行体育健身,为构建群众体育健身服务体系的各项量化指标奠定基础。
Cervical ossification of posterior longitudinal ligament treated by posterior decompression and internal fixation of cervical lateral mass screw 后路减压侧块镙钉固定治疗颈椎后纵韧带钙化症
The research projects in this aspect in the coming period will mainly be, determination of turbulent diffusion coefficient and longitudinal dispersion coefficient, pollution source function, rules of chamber contaminant mass transfer and how to calculate air quantity by using turbulent diffusion theory. 今后一段时期内,这方面的研究工作主要为紊流扩散系数、纵向弥散系数的确定、污染源源函数、峒室污染物的传递规律及如何利用紊流扩散理论计算通风风量等问题。
Analysis of the Distribution of Longitudinal Brake Force on Urban Mass Transit Bridge 城市轨道交通桥梁纵向制动力传递分析
By designing the longitudinal ruler the mass aluminum windshield pieces were assembled precisely. 通过设计纵向靠尺的方法实现大量铝片的精确装配。
Through the parameter studies of track irregularity, adhesion coefficient, longitudinal stiffness of primary suspension, mass of wheelset and axle-load, the influence of them on longitudinal vibration is researched. 通过对一些主要参数的研究,本文明确了轨道不平顺、粘着系数、一系纵向刚度、轮对质量和轴重对轮对纵向振动的影响。
The square of the ratio of longitudinal wave ( P-wave) velocity of rock mass to that of rock block is defined as intactness index of rock mass. 将岩体与岩块的纵波波速比的平方定义为岩体的完整性系数,不仅为国内外学者广泛认同,而且是现行规范的定义。
It is pointed out the longitudinal coupled vibration can be approximately summed up as the vibration of a single pier on which a concentrated mass M is applied, and the principle for selecting the M value stated in bibliography [ 1] is open to question. 指出桥墩的纵向耦联振动可以近似地归结为单墩加墩顶集中质量M来计算,但文献中关于M选取原则值得商榷。
An experimental study was performed of the enhanced heat transfer of the plane plates in the rectangle longitudinal vortex generator in a suction-type wind tunnel using heat and mass to analogize the naphthalene sublimation technique. 利用热质比拟萘升华技术,在吸入式风洞中对矩形纵向涡发生器平板强化换热进行了实验研究。
In this paper, ion in the longitudinal section 、 cross section motion equation 、 ion focus radius expression and quality dispersion expression in axisymmetric Plasma jet mass separation will be derived according to the motion equations in ion in the single particle track. 本文依据离子在单粒子轨道下的运动方程,推导出轴对称等离子体射流质量分离中离子在纵截面、横截面的运动方程、离子聚焦半径表达式及质量色散表达式。