Harmonic distortion arises from the nonlinear vibrations of mechanical device of seismic source and the coupling between the vibrator and the ground.
由于震源的机械装置和振动装置的非线性振动以及振板与大地的耦合等问题，在震源向地下输入能量的同时，也产生了谐波畸变。
An overview of the research conducted in the area of linear and nonlinear vibrations in the turning-point frequency range of loudspeakers and revolution shells is given in chapter 1.
第1章回顾了扬声器和旋转薄壳在转点频段的线性和非线性振动，发现旋转薄壳转点问题中尚有若干问题有待进一步研究。
The spectrum curves determined for linearly elastic systems still have significance for nonlinear hysteretic vibrations.
线性弹性系统确定的谱曲线对非线性滞回振动仍然是有意义的。
As to the problems of operating noises and vibrations, this paper applied the Direct Torque control (DTC) technique to SRM's controlling, based on the analysis of the nonlinear model of SRM.
针对开关磁阻电动机运行的振动和噪声问题，在对开关磁阻电机非线性模型进行分析的基础上，将直接转矩控制方法应用到SRM的控制当中。
In order to compensate the nonlinear errors induced by the rectification for high frequency vibrations in the inertial measure unit (IMU), the paper presents a new random sampling method.
为了补偿由于惯性敏感元件高频振动整流所引起的非线性输出误差，研究一种新的补偿方法——随机采样法。
This model was used to investigate the out-of-phase vibrations and pounding effects of adjacent girders at expansion joints by the nonlinear time-history analysis method.
在此基础上，应用非线性时程方法研究了纵向地震作用下连续梁桥相邻联的非同向振动和伸缩缝处的碰撞效应。
A new time-mode approach to nonlinear axisymmetric free vibrations of cylindrically orthotropic thin shallow spherical shells is presented in this paper.
本文给出了一种研究圆柱正交异性扁薄球壳非线性轴对称自由振动的新的时间模方法。
We investigate the effect of nonlinear curvature on vibrations of an elastic simple supported beam and roller with large deflection.
本文研究由于大挠度引起的曲率非线性对简支梁振动的影响。
Measured results indicate that there exist complex vibrations and various faults. The nonlinear faults and multi-faults are also obvious in the rotor system.
结果表明，该机组转子系统具有复杂的振动特性和丰富的故障特征，存在明显的非线性故障和多重故障现象。
In this paper, nonlinear free flexural vibrations analysis of closed circular cylindrical isotropic shells are presented.
本文分析了各向同性封闭圆柱壳的非线性自由振动。
Based on the geometrically nonlinear theory for axially extensible beams, formulations of free vibrations in the vicinity of thermal post-buckling were derived.
基于轴向可伸长梁的几何非线性理论建立了弹性直梁在热过屈曲静态大变形附近自由振动的几何非线性模型。
Based on the geometrically nonlinear theory for axially extensible beams, formulations of free vibrations in the vicinity of thermal post-buckling were derived.
基于轴向可伸长梁的几何非线性理论建立了弹性直梁在热过屈曲静态大变形附近自由振动的几何非线性模型。
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