MEMS运动件的芯片外机械驱动方法

研究MEMS微结构的片外机械式驱动问题 ,介绍了在MEMS硅芯片背面贴合一块宏观尺度PZT片的驱动思想即PZT产生机械运动 ,在硅固定件与微运动件之间产生动量耦合 ,从而驱动微运动件。重点探讨脉冲驱动、振动驱动两大类基本驱动方法及其特点 ,介绍国外代表性研究结果 ,并提出对该方法进一步研究的观点与设想。     

Simulation by Slepian method of plastic displacements of Gaussian process excited multistory shear frame

The object of study is a stationary Gaussian white noise excited multi-degree-of-freedom (MDOF) linear elastic, ideal plastic, linearly damped, statically determinate oscillator with several potential elements of ideal plastic yielding. Specifically the study is exemplified for a plane multistory shear frame with rigid traverses where all the connecting columns except the columns in one or more of the bottom floors have finite symmetrical yield limits. The white noise excitation acts on the mass of the first floor making the movement of the elastic bottom floors simulate a ground motion that interacts with the structure above the bottom floors. The method of study is so-called Slepian model simulation and is in principle the same for other statically determinate MDOF elasto-plastic oscillators of the considered type. The method is fast as compared to direct simulation and provides results that give good insight in the behavior of the plastic displacement response process.     

Dynamic stiffness vibration analysis using a high‐order beam model

This work presents the derivation of the exact dynamic stiffness matrix for a high‐order beam element. The terms are found directly from the solutions of the differential equations that describe the deformations of the cross‐section according to the high‐order theory, which include cubic variation of the axial displacements over the cross‐section of the beam. The model has six degrees of freedom at the two ends, one transverse displacement and two rotations, and the end forces are a shear force and two end moments. Using the dynamic stiffness matrix exact vibration frequencies for beams with various combinations of boundary conditions are tabulated and compared with results from the Bernoulli–Euler and Timoshenko beam models. Copyright © 2003 John Wiley & Sons, Ltd.     

机器人骨骼-肌肉系统工程模拟的动态分析

用振动学理论对仿人机器人骨骼-肌肉系统工程模型进行了分析，并提出了一种控制振动的方法，提高仿人机器人运动精度和缩短达到稳定的时间，同时阐述了这种方法的可行性。     

现场双面动平衡在离心式多级叶轮风机上的应用

对离心式多级叶轮风机进行振动频谱分析，认为叶轮存在动不平衡，造成风机振动超标，采用现场双面动平奢技术消除了风机转轴动不平衡。     

防晃水箱控制高层建筑地震反应的理论研究

防晃水箱是在一般水箱内安置环形防晃板，在高层建筑顶部设置这种水箱可以对建筑物的地震反应作被动控制。本文对这一系统进行了数值模拟，考虑了水箱和结构间的相互耦合作用，研究了水箱对建筑物地震反应的影响，数值分析为合理设计水箱提供了理论依据。     

解析小波及在振动分析中的应用

本文在希尔伯特变换和小波定义的基础上,提出解析小波及解析小波变换,分析了它的一个重要性质即对信号可实现正交滤波、提取包络。最后给出了小波在轴承振动共振解调应用的实例。     

复合棒弯曲振动的矩阵解法

按组成材料和横截面大小的不同，把复合棒分成若干单元，每单元两端的位移，截面转角，弯矩以及剪力间的关系用矩阵表示，各单元矩阵相乘即复到复合棒总的矩阵，最后由此求解复合棒的共振条件，以及两端振速比，还给出了应用例。     

（yxl）φ切压电石英谐振器振动模式分析

从压电方程，动力学方程入手，分析了（ｙｘｌ）φ切石英谐振器的厚度切变振动，利用自由边界条件及串联与并联谐振时的电学条件，求出了并联谐振频率和串联振频率，讨论了实测频率与频率公式存在一定偏差的原因。