 Wysłany: Sob 11:20, 25 Gru 2010 Temat postu: puma shoes 1996 |
|
| Square geometry nonlinear equivalent tension membrane - order frequency
, Zhu Xi. Time to consider the spatial variation of a random simulation of artificial [J]. Earthquake, 2002,24 (4): 407__412. [7] Xiayou Bo, Wang on the bridge,puma shoes, Zhang still root. A synthetic multi-point ground motion method [J]. World Earthquake Engineering, 2002,18 (1) :119-122. 5m long neglected gravity structure and to consider the gravity of the calculation of the equivalent first-order rate is more convenient and practical than the direct calculation. Also to be noted that, due to geometric nonlinear system with the vibration amplitude increases, the degree of nonlinearity is rapidly increasing, even in the initial membrane structure is only excited the first vibration mode, in a very short period of time, it energy distribution in the frequency domain will spread rapidly, thus no longer has meaning as defined in this paper the equivalent first-order frequency. However, for normal operation of the membrane structure, due to large prestressed so that its relative amplitude can be maintained in a smaller range, making this the fitting formula (1  , the applicability is guaranteed. 3 Conclusions In this paper Abtaining established discrete geometry nonlinear vibration rectangular tensioned membrane differential equations, derived the first order frequency of the equivalent structure calculation. Membrane based on the actual physical parameters of membrane structure and the structure of the work under the scope of the tension stress, and taking into account ease of use,moncler jackets, this method involves the analysis of all relevant parameters on the structure of the impact of non-linear case, by fitting The equivalent of the simple fitting formula for the frequency of the first order. References [1] Zhang Qilin. Cable and membrane structures [M]. Tongji University Press, 2002. [2] XY,moncler cheap, Shen Shizhao,moncler jackets cheap, LI. Membrane structure of the nonlinear wind vibration response [J]. Building Structures, 1999,38 __46. ��3] RizziSA. MuravyovA. A, EquivalentLinearizationAnalysisofGeometricallyNonlinearRandomVibrationsUsingCommer-cialFiniteElementCodes. NASA/TP-_20o2-_211761.20o2.14] RizziSA. MuravyovAA. ImprovedEquivalentLinearizationImplementationsUsingNonlinearStiffnessEvaluation, NASA/TM--2001--210838.2001. ��5] RobertsJ. B. Randomvibrationandstatisticallinearization, P. D. SpanosJOHNWILEY & SONS1990. [6] Jun Chen. Membrane structural engineering [M]. Beijing: China Building Industry Press. [7] Zhuang table, Liu Mingjie. Engineering Vibration [M]. Beijing: Higher Education Press, 1989. [8] Liu Xianming, Ye JH, Li A. Space-related ground motion more simplified method [J]. Earthquake Engineering, 2003, (1): 30_36. [9] Qu Tiejun. The spatial variation of ground motion characteristics and seismic response analysis of ground pipeline [D]. Harbin: Institute of Engineering Mechanics State Seismological Bureau, 1995. [10] King Yuan and so on. Dimensional multi-point input dam seismic response analysis [J]. Rock and Soil Mechanics, 2004,25 (1) :99-104. [11] SaragoniGRandHartGC. Simulationofartificialearth-quakes [J], EarthquakeEngineeringandStructureDynam-ics, 1974,2 (3) :249-267. [12] DonaldJ. Berndt, JamesClifford. Findingpatternsintimeseries: adynamicprogrammingapproach [M], AdvancesinKnowledgeDiscoveryandDataMining, AAAIPress ,1996:229 - 248. [13] Zhao Feng new, Hu Yu-Yin,ugg boots cheap, Li Xiaojun. Seismic statistical law of phase difference spectrum [J]. Natural Disasters, 1995,4:49 _56.
相关的主题文章： Moncler sale finishing those who also do so. In recent years moncler jackets signal to noise ratio is poor moncler jackets dividing the value of up to 5g |
|
