跳至主要内容

Wavelet-Based Response Computation for Base-Isolated Structure under Seismic Excitation

Read  full  paper  at:
http://www.scirp.org/journal/PaperInformation.aspx?PaperID=45296#.VL33mSzQrzE

Author(s) 
 
ABSTRACT
This paper presents a wavelet-based approach for estimating the response of the base-isolated structure under seismic ground motions. The seismic ground motion record is expressed as the multi-scale wavelet coefficients which presents the time frequency characteristics of the seismic excitation. The wavelet domain governing differential equation between the wavelet coefficients of the excitation and response is derived. Numerical study on a one-storey base isolated structure is performed. The result shows that the wavelet based response computation method is of high precision.
 
Cite this paper
Ding, W. and Sun, Z. (2014) Wavelet-Based Response Computation for Base-Isolated Structure under Seismic Excitation. Journal of Applied Mathematics and Physics, 2, 163-169. doi: 10.4236/jamp.2014.25020.
 
References
[1]Takeda, J. (1997) Building Isolation and Vibration Control. China Architecture & Building Press, Beijing.
 
[2]Caughey, T.K. and Stumpf, H.J. (1961) Transient Response of a Dynamic System under Random Excitation. Journal of Applied Mechanics, 28, 563-566. http://dx.doi.org/10.1115/1.3641783
 
[3]Basu, B. and Gupta, V.K. (1998) Seismic Response of SDOF System by Wavelet Modeling of Non-Stationary Process. Journal of Engineering Mechanics, 1142-1150. http://dx.doi.org/10.1061/(ASCE)0733-9399(1998)124:10(1142)
 
[4]Newland, D.E. (1994) Wavelet Analysis of Vibration, Part 1: Theory. Journal of Vibration and Acoustics, ASME, 116, 409-416. http://dx.doi.org/10.1115/1.2930443
 
[5]Daubechies, I. (1992) Ten Lectures on Wavelets. Society for Industrial & Applied Mathematics. Philadelphia, Pennsylvania.
 
[6]Newland, D.E. (1994) Wavelet Analysis of Vibration, Part 2: Wavelet Maps. Journal of Vibration and Acoustics, ASME, 116.
 
[7]Chopra, A.K. (2007) Dynamics of Structures, Theory and Applications to Earthquake Engineering. Higher Education Press, Beijing.
 
[8]Basu, B. and Gupta, V.K. (1997) Seismic Response of MDOF System by Wavelet Transform. Earthquake Engineering and Structures Dynamics, 26, 1243-1258. http://dx.doi.org/10.1002/(sici)1096-9845(199712)26:12<1243::aid-eqe708>3.0.co;2-p
 
[9]Du, P. and Sun, Z. (2010) Wavelet-Based Instantaneous Root-Mean-Square Response Estimation for sdof Systems under Seismic Excitation. Academic Engineering Mechanics, 27, 122-126.
 
[10](1991) Guide Specifications for Seismic Isolation Design, American Association of State Highway and Transportation Officials, Washington D.C.                                                                           eww150120lx
标签：

评论

发表评论

此博客中的热门博文

A Comparison of Methods Used to Determine the Oleic/Linoleic Acid Ratio in Cultivated Peanut (Arachis hypogaea L.)

Cultivated peanut ( Arachis hypogaea L.) is an important oil and food crop. It is also a cheap source of protein, a good source of essential vitamins and minerals, and a component of many food products. The fatty acid composition of peanuts has become increasingly important with the realization that oleic acid content significantly affects the development of rancidity. And oil content of peanuts significantly affects flavor and shelf-life. Early generation screening of breeding lines for high oleic acid content greatly increases the efficiency of developing new peanut varieties. The objective of this study was to compare the accuracy of methods used to classify individual peanut seed as high oleic or not high oleic. Three hundred and seventy-four (374) seeds, spanning twenty-three (23) genotypes varying in oil composition (i.e. high oleic (H) or normal/not high oleic (NH) inclusive of all four peanut market-types (runner, Spanish, Valencia and Virginia), were individually tested ...
发表评论
阅读全文

Location Optimization of a Coal Power Plant to Balance Costs against Plant’s Emission Exposure

Fuel and its delivery cost comprise the biggest expense in coal power plant operations. Delivery of electricity from generation to consumers requires investment in power lines and transmission grids. Placing a coal power plant or multiple power plants near dense population centers can lower transmission costs. If a coalmine is nearby, transportation costs can also be reduced. However, emissions from coal plants play a key role in worsening health crises in many countries. And coal upon combustion produces CO 2 , SO 2 , NO x , CO, Metallic and Particle Matter (PM10 & PM2.5). The presence of these chemical compounds in the atmosphere in close vicinity to humans, livestock, and agriculture carries detrimental health consequences. The goal of the research was to develop a methodology to minimize the public’s exposure to harmful emissions from coal power plants while maintaining minimal operational costs related to electric distribution losses and coal logistics. The objective was...
发表评论
阅读全文

Evaluation of the Safety and Efficacy of Continuous Use of a Home-Use High-Frequency Facial Treatment Appliance

At present, many home-use beauty devices are available in the market. In particular, many products developed for facial treatment use light, e.g., a flash lamp or a light-emitting diode (LED). In this study, the safety of 4 weeks’ continuous use of NEWA TM , a high-frequency facial treatment appliance, every alternate day at home was verified, and its efficacy was evaluated in Japanese individuals with healthy skin aged 30 years or older who complained of sagging of the facial skin.  Transepidermal water loss (TEWL), melanin levels, erythema levels, sebum secretion levels, skin color changes and wrinkle improvement in the facial skin were measured before the appliance began to be used (study baseline), at 2 and 4 weeks after it had begun to be used, and at 2 weeks after completion of the 4-week treatment period (6 weeks from the study baseline). In addition, data obtained by subjective evaluation by the subjects themselves on a visual analog scale (VAS) were also analyzed. Fur...
发表评论
阅读全文