Wave distortion will occur when finite amplitude ultrasonic waves propagate in elastic solids, resulting in the production of higher order harmonics.
有限振幅的超声波在固体中传播时会发生波形畸变，伴随着高次谐波的出现。
The 2-D nonlinear longitudinal wave in the isotropy solid medium studied in this paper is the finite amplitude wave, which thought about the nonlinear of the motion and medium.
本文研究了各向同性固体介质中的二维非线性有限振幅纵波，采用有限元方法求解二维非线性纵波运动方程。
The finite amplitude solitary waves in stratified fluids of finite depth, in which the density varies with depth in lower layer but keeps uniform in upper layer, are investigated.
本文采用理论分析和符号运算相结合的方法研究有限深分层流体有限振幅内孤立波。
The phenomenon of subharmonic bifurcation is observed in experiments of sound wave of finite amplitude, which are performed in liquid nitrogen and water, respectively. The power spectrum is obtained.
在液氮及水中进行了有限振幅声波的实验，观察到了次谐波分岔现象，得出了分岔谱。
The additional axial finite magnetic field also has some influence on the field amplitude.
外加纵向有限磁场也对场幅值分布有一定的影响。
The time history curves and the phase diagram for the oscillation are obtained by solving the differential relation between vibration amplitude and tensile load with finite difference method.
应用有限差分法求解球壳振动的振幅和外加荷载之间的微分关系，得到了球壳振动的时程和相图。
The dependence of amplitude of first break for acoustic logging in cased borehole on the thickness of microannulus is studied in this paper with Finite Element Method (FEM).
本文采用有限元计算方法研究了微环厚度对套管井声波测井初至波幅度的影响。
This paper mainly describes the amplitude and phase errors caused by zero-order holder and the error caused by finite word length of D/A, and computer simulation test of D/A error is also introuced.
针对零阶保持器引起的幅度误差和相位误差，以及D/A转换器有限字长引起的误差进行了较为详细的分析，并进行了D/A误差仿真试验。
Digital, Digital refers to a signal whose amplitude remains constant for a finite period of time. Digital signals are commonly represented as a series of high and low pulses.
数字式，指一种信号。该信号在一定的时间内，振幅保持不变。通常由一系列的高低脉冲表示。
When the amplitude of the fluctuation is finite with respect to the average magnetic field intensity, the nonlinear terms in the garvening equations can not be droped and the WKB aproxima-tion fails.
当脉动幅度与平均磁场强度之比为有限值时，在一般情况下，控制方程中的非线性项不能略去，因而不能用WKB解来描述有限振幅脉动幅度的径向变化。
Finally, the torsion vibration nature frequency and torque amplitude factor of a rolling mill are calculated by using finite element method.
最后使用有限元法计算了某钢厂冷轧机主传动轴系的扭振固有频率和转矩放大系数。
Temperature distribution and its amplitude of the sensor under constant current excitation are simulated with finite element method.
用有限元方法模拟了恒流加热方式下气压对传感器温度分布和温度大小的影响。
Based on these two theories, the finite element cable model were respectively established which was used to simulate the large amplitude vibration of cables.
在两种理论的基础上，分别建立了拉索风雨激振的有限元模型，模拟了拉索发生风雨激振时的大幅振动。
Based on these two theories, the finite element cable model were respectively established which was used to simulate the large amplitude vibration of cables.
在两种理论的基础上，分别建立了拉索风雨激振的有限元模型，模拟了拉索发生风雨激振时的大幅振动。
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