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Development of a seismic design method based on response spectra for building structures
ZHOU Xiyuan, YU Ruifang
《结构与土木工程前沿(英文)》 2007年 第1卷 第2期 页码 129-141 doi: 10.1007/s11709-007-0014-2
关键词: generalization classical damping mode-superposition response calculation formula damping theory
Dynamics of structural systems with various frequency-dependent damping models
Li LI,Yujin HU,Weiming DENG,Lei LÜ,Zhe DING
《机械工程前沿(英文)》 2015年 第10卷 第1期 页码 48-63 doi: 10.1007/s11465-015-0330-5
The aim of this paper is to present the dynamic analyses of the system involving various damping models. The assumed frequency-dependent damping forces depend on the past history of motion via convolution integrals over some damping kernel functions. By choosing suitable damping kernel functions of frequency-dependent damping model, it may be derived from the familiar viscoelastic materials. A brief review of literature on the choice of available damping models is presented. Both the mode superposition method and Fourier transform method are developed for calculating the dynamic response of the structural systems with various damping models. It is shown that in the case of non-deficient systems with various damping models, the modal analysis with repeated eigenvalues are very similar to the traditional modal analysis used in undamped or viscously damped systems. Also, based on the pseudo-force approach, we transform the original equations of motion with nonzero initial conditions into an equivalent one with zero initial conditions and therefore present a Fourier transform method for the dynamics of structural systems with various damping models. Finally, some case studies are used to show the application and effectiveness of the derived formulas.
关键词: damping viscoelasticity dynamic analysis mode superposition method Fourier transform method
霍兵勇,易伟建
《中国工程科学》 2015年 第17卷 第1期 页码 151-160
随着实验模态分析方法的广泛应用和不断发展,在工程应用中,研究者希望能减少限制条件,增加分析的可靠性。本文发展一种识别系统模态参数的新方法,本方法无需知道系统的输入信息且不用建立系统模型,仅通过对测试记录的响应信号进行频谱分析即可识别系统的模态参数,依据系统中各响应点的信号,先采用离散反卷积方法从各响应点信号中分离出谐波参数作为初步的识别结果,在此基础之上,结合频域空间曲线拟合的方法修正识别结果中受频谱混叠影响而偏差较大的谐波参数,再联合这些已提取的谐波参数得到系统的模态参数。通过对实际结构测试数据的分析,证明本方法只用输出数据识别的模态参数与模态分析软件用传递函数识别的结果一致。
Anefficient quadrature demodulator for medical ultrasound imaging
Hao ZHOU,Yin-fei ZHENG
《信息与电子工程前沿(英文)》 2015年 第16卷 第4期 页码 301-310 doi: 10.1631/FITEE.1400205
关键词: B-mode ultrasound imaging Color flow imaging Quadrature demodulation Finite impulse response filter
基于电流滑模控制策略的五相感应电机指数响应电子变极技术 Article
Jia-qiang YANG, Rong-sen YIN, Xiao-jun ZHANG, Jin HUANG
《信息与电子工程前沿(英文)》 2017年 第18卷 第8期 页码 1151-1166 doi: 10.1631/FITEE.1601728
Full-field dynamic strain reconstruction of an aero-engine blade from limited displacement responses
《机械工程前沿(英文)》 2023年 第18卷 第1期 doi: 10.1007/s11465-022-0731-1
关键词: aero-engine blade displacement response dynamic strain reconstruction mode shape strain gauge
韩修廷,王洁春,焦振强,高飞,宋宇波
《中国工程科学》 2005年 第7卷 第10期 页码 64-68
提出了在套损振动波检测过程中提高信号信噪比的方法。检测过程中,在井口敲击套管并接收、分析套管的回波,以了解介质的变化情况。由于反射波信号强度较微弱,单纯用一组接收信号无法进行正确的套损分析,采用信号增强方法,即利用多个类似信号进行叠加,增强反射波的有效信号,降低背景噪声,从而得到有用信息,进行正确的套损状况分析。开发了相应的信号处理软件,提高了信号处理速度。通过10井次的测试表明,技术原理可行,软件工作稳定、可靠,便于操作,可以进行多种方法的信号处理,极大地提高了工作效率。
Seismic performance of prestressed concrete stand structure supporting retractable steel roof
Yiyi CHEN, Dazhao ZHANG, Weichen XUE, Wensheng LU
《结构与土木工程前沿(英文)》 2009年 第3卷 第2期 页码 117-124 doi: 10.1007/s11709-009-0024-3
关键词: retractable steel roof prestressed concrete seismic performance failure mode inelastic response shaking table test
《结构与土木工程前沿(英文)》 页码 1428-1441 doi: 10.1007/s11709-023-0998-2
关键词: intake tower NSGA-II mode decomposition response spectrum method anti-seismic engineering measures optimization design variable project cost
An efficient method for the dynamic interaction of open structure-foundation systems
LIU Jingbo, GU Yin, LI Bin, WANG Yan
《结构与土木工程前沿(英文)》 2007年 第1卷 第3期 页码 340-345 doi: 10.1007/s11709-007-0045-8
关键词: structure-foundation interaction superposition interaction problem freedom efficient
A discussion of objective function representation methods in global optimization
Panos M. PARDALOS, Mahdi FATHI
《工程管理前沿(英文)》 2018年 第5卷 第4期 页码 515-523 doi: 10.15302/J-FEM-2018044
Non-convex optimization can be found in several smart manufacturing systems. This paper presents a short review on global optimization (GO) methods. We examine decomposition techniques and classify GO problems on the basis of objective function representation and decomposition techniques. We then explain Kolmogorov’s superposition and its application in GO. Finally, we conclude the paper by exploring the importance of objective function representation in integrated artificial intelligence, optimization, and decision support systems in smart manufacturing and Industry 4.0.
关键词: global optimization decomposition techniques multi-objective DC programming Kolmogorov’s superposition space-filling curve smart manufacturing and Industry 4.0
Abdelkarim AMMAR,Amor BOUREK,Abdelhamid BENAKCHA
《能源前沿(英文)》 2020年 第14卷 第4期 页码 836-849 doi: 10.1007/s11708-017-0444-z
关键词: induction motor direct torque control (DTC) space vector modulation (SVM) sliding mode control (SMC) sliding mode observer (SMO) dS1104
黄玉划,胡爱群,宋宇波
《中国工程科学》 2004年 第6卷 第7期 页码 70-74
由于CBC-MAC模式不可并行处理,提出了一种基于双重分组的并行认证模式(PKCB)。PKCB模式同并行认证模式PMAC相比,安全性和速率都有显著提高,PKCB认证模式与CTR(计数器)加密模式结合可构成分组密码算法的一种全工作模式。在此基础上提出了一种基于密钥计数的并行认证模式(KCTR-MAC)。KCTR-MAC模式安全性比PMAC模式高得多,而速率未降低,KCTR-MAC认证模式和CTR加密模式结合也可构成分组密码算法的一种全工作模式(2CTR),2CTR模式的综合性能不亚于标准模式CCM(CTR with CBC-MAC),是一种安全快速的实用模式。
《结构与土木工程前沿(英文)》 页码 179-190 doi: 10.1007/s11709-022-0888-z
关键词: uncertain composite plate stochastic assume mode method Karhunen−Loève theorem polynomial chaos approach plate buckling irregularity in buckling mode shapes
标题 作者 时间 类型 操作
Development of a seismic design method based on response spectra for building structures
ZHOU Xiyuan, YU Ruifang
期刊论文
Dynamics of structural systems with various frequency-dependent damping models
Li LI,Yujin HU,Weiming DENG,Lei LÜ,Zhe DING
期刊论文
Full-field dynamic strain reconstruction of an aero-engine blade from limited displacement responses
期刊论文
Seismic performance of prestressed concrete stand structure supporting retractable steel roof
Yiyi CHEN, Dazhao ZHANG, Weichen XUE, Wensheng LU
期刊论文
Optimization design of anti-seismic engineering measures for intake tower based on non-dominated sorting genetic algorithm-II
期刊论文
An efficient method for the dynamic interaction of open structure-foundation systems
LIU Jingbo, GU Yin, LI Bin, WANG Yan
期刊论文
A discussion of objective function representation methods in global optimization
Panos M. PARDALOS, Mahdi FATHI
期刊论文
Robust SVM-direct torque control of induction motor based on sliding mode controller and sliding mode
Abdelkarim AMMAR,Amor BOUREK,Abdelhamid BENAKCHA
期刊论文