调谐质量阻尼控制装置在深圳地王商业大厦风振控制中的应用

本文从控制装置实现角度，研究了调谐质量阻尼控制装置的关键技术，其中包括装置的支撑系统、气压弹簧和液压阻尼器。应用这些技术研究了在地王大厦安装HMD装置控制结构风振响应，解决了地王大厦在风荷载作用下总侧移和层间位移角超出我国规范限值的问题。在准确把握结构动力特性和设计准则的前提下，对控制装置的参数进行了设计。系统仿真分析表明，HMD控制装置在地王大厦上应用可以有效降低结构侧向位移。     

基础隔震结构随机地震响应分析的复模态法

本文对多自由度基础隔震结构的随机地震响应问题进行了系统研究，首先建立了运动方程，然后用第一振型将上部结构展开，针对所得方程为非经典阻尼、非对称质量和非对称刚度情况，用复模态法解耦，获得了以第一振型表示的结构地震响应的解析解，对单自由度体系，此解即为结构响应的精确解，从而建立了两自由度体系在任意非经典阻尼与非对称质量和刚度情况下随机地震响应解析解分析的一般方法。本文方法也可用于带TMD减震结构、无损伤“加层减震”加固结构的随机地震响应分析与优化设计。     

简谐荷载作用下伴生自由振动的研究

本文基于结构动力学的基本理论，推导了简谐荷载作用下，瞬态自由振动反应的理论解。与受迫振动的理论解比较，详细研究了伴生自由振动的各种动力反应（位移、加速度、内力）的振动规律。研究结果表明，在一定的参数范围内，伴生自由振动不能忽略，有时甚至是动力反应中的主要成分。     

Traffic‐induced variability in dynamic properties of cable‐stayed bridge

The traffic‐induced variability in the dynamic properties of a cable‐stayed bridge is investigated using ambient vibration measurements. Under a relatively steady wind and temperature environment, the ambient vibration test was conducted on the bridge with normal traffic conditions and totally 24 h acceleration response time histories were recorded. These data are divided into 12 sections with each data section containing 2 h measurements. Thereby the modal variability due to changing traffic loading is investigated through post‐processing of the data in each section in both amplitude and frequency domains. The result indicates that the natural frequencies of the global modes can exhibit as much as 1% variation within a day. The modal amplitudes of each mode as well as the modal deflection at each measurement position vary insignificantly. The damping ratios however are sensitive to the vibration intensity, especially when the deck vibration exceeds a certain level. Copyright © 2002 John Wiley & Sons, Ltd.     

高层建筑风振监测的实践与初步分析

叙述了高层建筑风振监测的基本方法及监测过程，以大量的实际监测数据为基础，初步总结出了高层建筑的风振规律。     

隧道掘进爆破地震峰值神经网络预报研究

结合某抽水蓄能电站尾水隧道掘进爆破地面振动监测结果,建立了基于BP神经网络隧道掘进爆破振动速度峰值的预报模型。并对铁路运输安全进行预报,与现场实际较好地吻合。将神经网络模型预报的结果与传统方法(经验公式法)预报的结果相比,前者的预报结果有明显的改善。对于指导隧道掘进爆破设计,优化爆破参数,确保安全具有重要的意义。     

Reducing ground vibrations caused by underground blasts in LKAB Malmberget mine

Due to the large-scale sub-level caving in Malmberget mine and the short distance between the mine and Malmberget town, the ground vibrations in the town have reached a high level since the year 2001 when large scale caving mining started. In order to control and reduce the high vibrations, LKAB launched a research project on active reduction of vibrations in Malmberget by using the wave interference or wave superposition method with electronic detonators. By means of this method, the vertical vibrations were reduced by 10% and the total vibration time for a ring blast was reduced by 80% according to five ring tests in the mine. For a further reduction of the vibrations, a second method, named changing initiation sequence in ring blasts, was developed on the basis of stress wave theory and the geographic conditions of the town and the mine. The second method has so far been applied in all of the drifts near the town, and the vibrations measured at the town show that the vertical vibrations caused by production blasts in the mine have been reduced by more than 31% on average. In addition, a third method, dividing a ring into two parts during blasting, was developed and used to reduce the ground vibrations from a number of very large rings in the mine. The results indicate that the vibrations have been reduced by more than 33%, and a more interesting and surprising result is that ore extraction has been increased by the third method.     

列车振动的地震记录信号特征

在给出列车的多点运动源基本描述的基础上，对2003年3月8日在大秦铁路怀柔段的观测试验记录进行了初步分析. 分析表明:列车振动所具有的绿色环保、频谱较宽、重复性好和稳定性强的优点，除传统认识的噪声和振动干扰外，也可以用于地下结构的探测研究.如能在理论模型和信号分析处理方法，甚至观测积累方面进行深入的探索研究，将可为地球物理勘探开辟新的途径.      

成层地基一维土层对地震的随机反应分析

首先基于改进的一维剪切梁模型，对成层土层推导了确定自振频率、振型函数、参与系数及稳态动力响应的封闭型解析表达式，首次证明了成层土层振型函数的正交性，然后在此基础上，利用随机振动理论，研究了成层土层对地震的随机动力反应问题，关于基岩输入地震加速度的功率谱密度函数，考虑了两种形式：白噪声谱和过滤白噪声谱。数值计算结果表明：对这两种谱，土层的最大期望反应是不相同的；平稳输入与输出过高估计了土层的随机反应。     

考虑流-固耦合影响的挡水结构自振特性

对流体-固体之间的动力相互作用的问题，采用流体有限元法研究结构自振特性的影响。建立了流固耦合运动方程体系，并对耦合方程组的求解过程进行了推导与阐述。编制了流体有限元自动生成程序，使得流固耦合问题从建立模型到分析能够利用计算机自动实现。最后以挡水结构作为算例，分别就不同水位工况和水体采用不同长度模型对结构振动的影响进行了分析。