查询词典 damping

According to analysis of roots locus,fast excitation tends to decrease damping of power systems which is controlled by AVR than slow excitation.But eigenvalues of power system are far from imaginary axis and strong damping is obtained when fast excitation system is added.

在高放大倍数的AVR控制下，快速励磁较慢速励磁更容易恶化系统阻尼；但是在同时附加励磁控制的情况下，快速励磁可使系统的机电模式根轨迹远离虚轴，机电模式阻尼较大；而慢速励磁下，系统机电模式根轨迹接近虚轴，机电模式阻尼较小，快速励磁优于慢速励磁。

By using the"energy equivalent method",thepiezoelectric structure damping is equivalent to a viscosity damping,according to which the quantitative relationship between the response time ofan one-dimensional piezoelectric actuation system and the mechanical qualityfactor of its piezoelectric material.The inexactness of the previouscorresponding relationship obtained by Taylor is analyzed.

用能量等效法将压电结构阻尼等效为粘性阻尼，建立起一维压电致动系统的响应时间与压电材料机械品质因子之间的定量关系，分析了以前由Taylor所获得的定量关系的不严格性。

In accordance with the situation that the damping was the non-classical damping,the structure was asymmetric,and random wind spectrum was irrational fraction wind spectrum,the equations obtained were decoupled with the complex mode theory.

建立运动方程，用第一振型将主体结构展开，针对非经典阻尼和非对称结构以及脉动风谱为非有理分式风谱的情况，运用复模态理论将所得方程进行解耦，获得了以第一振型表示的结构随机风振响应的解析解。

A multistage jounce bumper, including a jounce bumper cushion integrated with a hydraulic jounce bumper, wherein provided are the damping characteristic of the hydraulic jounce bumper and the damping/spring characteristics of a jounce bumper cushion.

一种多级颠簸缓冲器，包括与液压颠簸缓冲器整体形成的颠簸缓冲器垫，其中提供了液压颠簸缓冲器的减震特性，同时提供了颠簸缓冲器垫的减震/弹簧特性。

K.The influences of longitudinal phonon and transverse phonon on the magnon damping are compared,and the influences of all relevant parameters on magnon damping are also discussed.

比较了纵向声子与横向声子对磁振子衰减的影响，也讨论了各项参数的变化对磁振子衰减的影响。

By Matsubara-Green function method,the magnon damping under such on interaction is studied,with the magnon damping calculated on the main symmetric point/line in Brillouin zone for different parameters in the system.

利用格林函数方法研究了磁振子-声子相互作用下的二维绝缘铁磁体的磁振子衰减，计算了布里渊区的主要对称点线上的-ImΣ*(1)。

The influence of the interaction on the mode shapes of the dam is also analyzed. Based on the above analyses, two modified models, which are massless damping foundation and part of mass foundation, are presented to simulate the dam--foundation interaction mechanism. A new method to form the non-proportional damping matrix is proposed.

在此基础上，为了更好地模拟坝—地基相互作用的机制，提出了两种改进的地基计算模型：无质量有阻尼地基模型和部分有质量地基模型，建立了形成体系非比例阻尼矩阵的方法，并用来分析了相互作用对重力坝的地震反应的影响。

A modal value analysis method is presented to obtain a reduced-order dynamic model with modal coordinates for structures with small damping or without damping.

针对小阻尼和无阻尼结构，提出了一种模态价值分析方法，用于在模态坐标下的动力学模型降阶问题。

In chapter 4, we investigated the behavior of wave in a nonlinear monatomic chain with damping. Parameter dissipation nonlinear Schrodinger equation of lattice dynamics is first obtained. Then we discuss effect of damping on soliton of monatomic chain.

第四章，我们研究弱阻尼作用下非线性单原子链中的波动行为，首次在晶格动力学中得到了参数耗散型非线性Schrodinger方程 oDNLS方程人以及阻尼对单原子链中孤立子的影响。

This damping mechanism well showed the damping properties of Zn-27Al alloys after modification, solution treatment and natural ageing were advanced for the increase of the phase interface and is's movability.

上述微观机理充分揭示了变质固溶时效后的Zn-27Al合金由于组织细化及非共格可动界面的增多，使合金阻尼大大提高的原因。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。