共查询到20条相似文献，搜索用时 15 毫秒
1.
This paper presents a robust H∞ output feedback control approach for structural systems with uncertainties in model parameters by using available acceleration measurements and proposes conditions for the existence of such a robust output feedback controller. The uncertainties of structural stiffness, damping and mass parameters are assumed to be norm-bounded. The proposed control approach is formulated within the framework of linear matrix inequalities, for which existing convex optimization techniques, such as the LMI toolbox in MATLAB, can be used effectively and conveniently. To illustrate the effectiveness of the proposed robust H∞ strategy, a six-story building was subjected both to the 1940 El Centro earthquake record and to a suddenly applied Kanai-Tajimi filtered white noise random excitation. The results show that the proposed robust H∞ controller provides satisfactory results with or without variation of the structural stiffness, damping and mass parameters. 相似文献
2.
In this paper we investigate the sources of two kinds of forces to form the stress field in the lithosphere. These are the
drag force caused by mantle flow and the force system along plate boundaries. The results show that both forces control the
basic stress pattern in China and compressive stresses can fit with the stress patterns constructed by focal mechanisms,in-situ stress measurements in boreholes and that deduced from other geophysical and geological observation.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,13, 295–306, 1991.
This research is sponsored by the Chinese Joint Seismological Science Fundation. 相似文献
3.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,13, 248–253, 1991. 相似文献
4.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,13, 243–247, 1991. 相似文献
5.
Zhi-Rong Yang 《地震学报(英文版)》1993,6(3):781-787
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,15, 123–127, 1993. 相似文献
6.
Preliminary study on late Quaternary activities of buried faults in Beijing plain area 总被引：1，自引：0，他引：1
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,15, 385–388, 1993. 相似文献
7.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,13, 395–398, 1991. 相似文献
8.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,14, 124–127, 1992. 相似文献
9.
Bo-Chong Zhang Rui Chen Hong Li Ying-Nan Qi Ji-Zhen Mao Peng Liu Fang-Quan Li 《地震学报(英文版)》1993,6(3):769-774
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,15, 253–256, 1993. 相似文献
10.
Shu-Jun Yu 《地震学报(英文版)》1993,6(2):541-548
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,15, 109–114, 1993. 相似文献
11.
Hongji Li 《地震学报(英文版)》1992,5(3):597-607
Incorrect results including false low frequency components may appear during the recovery of ground motion in the frequency
domain. In order to check the quality of restoration in the frequency domain of CDSN broad-band seismograms, a digital model
of the seismograph systems, based on modern control engineering, is presented and improvement of the method of restoration
in the frequency domain is described. Examples shown in this paper demonstrate the effectiveness of the proposed approach
in improving the restoration of true ground motion.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,14, 90–99, 1992.
The work is supported by the Chinese Joint Seismological Science Foundation. 相似文献
12.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,14, 243–246, 1992. 相似文献
13.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,15, 257–260, 1993. 相似文献
14.
Based on Generalized Seismic Ray Theory (Helmberger, 1968), a new quickly linear inversion method from the data of seismic
waveform to seismic moment tensor and source mechanism for domestic earthquake is studied in this paper. Six moderately strong
earthquakes which occurred in Chinese mainland in the past few years are studied. The seismic source parameters of these earthquakes,
seismic moment tensors, scalar seismic moments, fault plane solutions and source time functionsetc, are obtained.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,15, 261–268, 1993. 相似文献
15.
Peide Wang Ming Wang Jiayu Zhou Jiang Qu Xiaoxi Ni Jiangchuan Ni Yuntai Chen Francis T. Wu 《地震学报(英文版)》1992,5(2):337-342
Near-field records of two strong aftershocks with magnitudeM
S=6.7 andM
S=6.3 in the Lancang-Gengma earthquakes sequence, Yunnan Province, November 1988, are used to calculate the response spectrum.
The instruments, site conditions and the methods for computing are also illustrated in this paper.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,13, 338–343, 1991.
This project is supported by The Chinese Joint Seismological Science Foundation, SSB and the West Yunnan Earthquake Prediction
Test Field, Yunnan Seismological Bureau. 相似文献
16.
In this paper, the coefficients of Parkinson vectora, b and the in-phase partA
r, Br and quadrature-phase partA
i, Bi of transter functions are calculated by using two kinds of data processing methods, respectively. The results of both methods
are close to each other. All these six parameters above are low in value, showing that the electric structure in Heze area
is rather uniform. It seems that the anomalous changes appeared in both results, and the values of parameters decrease before
and after Heze earthquake.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,13, 113–120, 1991. 相似文献
17.
The neotectonic stress field in Chao-Shan area is analyzed with the fault striation analysis method. At least four types of
stress states are detected, which are in close connection with their locations relative to the basin. Generally, from the
subsidence centres to places far from them, horizontal tectonic stress varies from tensile to compressive.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,14, 36–41, 1992. 相似文献
18.
Dahua Li 《地震学报(英文版)》1992,5(4):849-856
The algorithm of successive formulas for computing numerical vibrating response of unequal time interval for a single-degree
of freedom oscillator in linear cases are more systematically introduced in the paper. Some numerical analysis characteristics
of the algorithm are discussed. It is proved that the algorithm is unconditionally stable and convergent. A computer program
for simultaneous calculation of the relative displacement, the relative velocity and the absolute acceleration response spectra
is edited in the paper.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,14, 236–242, 1992. 相似文献
19.
Mei-Xiang Bai Ke-Yuan Wang Jing-Yuan Liu Xiao-Dan Sun Wen-Zhuang Shen Aerkuat Nurmakambeitov A. Seidekov V. A. Jaibig A. A. Vlacova A. Toseimov 《地震学报(英文版)》1993,6(4):1041-1047
The Zaisang earthquake (M
s=7.3) on June 14, 1990 occurred in the boundary between China and Kazakstan. During the great shock, 3 persons lost their
lives, 30 people had been hurt and 340 houses collapsed. The intensity of the epicentre is VIII Degree. The economic losses
equals to about 320 000 000 Yuan. This large earthquake was occurred on a new born fault, it belongs to main shock-aftershock
type earthquake.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,15, 360–365, 1993. 相似文献
20.
In this paper, the three-dimensional thermal structure and the two-dimensional thermal stress caused by the horizontal inhomogeneity
of the thermal structure in the crust of the Bohai Sea and its surroundings were analyzed using the geothermal and the crust
structural data by means of the finite element method. As resulted, the horizontal distribution of the temperature in the
upper crust is obviously different from that in the lower crust in most part of the region. But the horizontal distribution
of the heat flow is constant in the crust. There is a belt where the thermal structure of the crust is intensely changed around
Tangshan. There are some different characteristics of the thermal stress of the crust around Tangshan, in the North-China
plain, in the Bohai Sea gulf, and in the middle part of the Bohai Sea. Utilizing those results, the distribution features
of the seismic activity in the region were explained in this paper.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,14, 29–35, 1992.
This project is supported by the Chinese Joint Seismological Science Foundation. 相似文献