查询词典 time of vibration

According to the analysis theory of spatial vibration of high-speed train and slab track system, the effect of voided slab induced by deteriorations of cement asphalt mortar layer, such as felt invalidation, dehiscence, embrittlement and cataclasm, etc, on vibration responses of the slab track was studied.

摘 要：基于高速列车-板式轨道系统空间振动分析理论，研究板式轨道水泥沥青砂浆填充层的劣化(如脱层、开裂、脆化与碎裂等)引起的轨道板悬空现象对板式轨道振动响应的影响。

And combined with field test of the chain belt vibration, the generation condition of the chain belt vibration and crawling was explored.

结合对铸型机链带振动的现场测试，探讨铸型机链带振动和爬行产生的条件，为铸型机振动和爬行的控制提供依据。

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。

In this paper, hydraulic impact that caused by the hydrodriving vibration compactor in the course of the starting vibration and the measures of reducing the hydraulic impact were studied.

本文对液压传动振动压路机起振过程的液压冲击机理及其防治措施进行了研究。

The automatic identification of vibration, the composition of control forces with different frequencies, the controlalgorithm and process are studied. 4. The nonlinear property of active magnetic actuator , the major part of rotor vibration control system, is investigated.

针对旋转机械一些故障引起的多频振动问题，以及目前各种平衡头只能控制工频振动，对其它频率成份的振动无能为力的这一情况，提出用电磁执行器进行多频振动的前馈自学习控制方法。

Eular -Bernonulli beam model and Tomosimko beam model were adapted to study the inherence vibration properties of the pipelines under dynamical loads, and the analytical answers of the chanmical results were brought out in the fifth chapter. And gave priority to the Eular -Bernonulli beam model, the simply and convenient analytical resolution for the response of the pipelines under dynamical traffic loads through the impulse function and the congruence method of the vibration form and so on.

本文采用Eular-Bernonulli梁模型和Tomosimko梁模型对动力下Kelvin粘弹性地基中管道固有振动性状进行了分析，提出了各力学结果描述的解析式；并以Eular-Bernonulli梁模型为主，基于脉冲函数、振型迭加法等对管道在动力交通荷载作用下的管道响应问题提出简单便捷的解析算法；在管道受力结果的分析中，考虑管道响应输出的随机性，将管道响应用随机过程来描述其概率特征，使得结果描述更加真实准确。

Then, the structure of vibration system is brought forward, the composite vibration system composed of conical horn and disc.

然后，提出了振动系统的构成，即圆锥形变幅杆与圆盘组成的复合振动系统。

For demonstrating about free fall、horizontal cast、stant cast、the conservation law of mechanical energy、the rule of collision、the formula of Centripetal-Force、simple periodic vibration and the vibration graph.etc.

能完成自由落体、平抛、斜抛、机械能守恒、弹性碰撞、完全非弹性碰撞、向心力、简谐振动、振动图象等高中力学实验。

The vibration acceleration′s results from three operation tests and four comprehensive tests of double decker container flat car are summarized,then the adaptability of double decker container flat car to railway is analyzed,and the results that the vertical vibration acceleration of the car body is larger than usual is analyzed.

总结了双层集装箱车3次运行试验和4次综合试验的振动加速度测量结果，对双层集装箱车的线路适应性进行了分析，对其车体垂向振动加速度较大的原因进行了分析。

In light of the fact that the vertical vibration acceleration is on the high side on the loaded double-deck container flat car , on the basis of the test results from operation on track, the causes to the acceleration being on the high side are analyzed from the angle of resilient vibration of the cars.

针对双层集装箱平车重车垂向振动加速度值偏大的实际情况，根据线路运行测试结果，从车辆弹性振动的角度分析了加速度值偏大的原

Researches reveal that students who suffer from corporal punishment tend to resort to violence in their future life.

研究表明遭受过肉体惩罚的孩子倾向于在他们今后的人生中使用暴力。

Total sugar of sarcocarp and chlorophyll of pericarp increased firstly, and then decreased afterward along with altitude; Titratable acidity, ascorbicacid and anthocyanin of pericarp were increased along with altitude; The content of protein increased firstly and decreased afterward along with altitude; Carotenoid of pericarp were decreased along with altitude.

果肉总糖和果皮叶绿素含量随海拔高度升高先升高后降低；可滴定酸、维生素C和果皮花青苷含量均随海拔升高而升高；蛋白质在1720m处最大，1420m处最小；果皮类胡萝卜素随海拔升高而降低。