In order to evaluate vibration failure behavior of structures under multiaxial and uniaxial excitations, theory analysis, finite element analysis and experiments on dynamic responses of structures under multiaxial and uniaxial excitations are performed in this paper. Results show that the structural vibration mode of different directions can be excited simultaneously under multiaxial excitations. Under three simultaneous uncorrelated axial excitations, the responses of the structure are the square root of the sum of the squares of each uniaxial excitations results. If the random excitations are correlated, there are significant effects of input correlation on the dynamic response, and the effects are regularly. Additional, the reasons for the phenomena mentioned above are also analyzed. This study provides references for the vibration failure behavior analysis of the structure under multiaxial and uniaxial random excitations.
Key words
dynamic response /
multiaxial random excitation /
vibration fatigue /
modal shape
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References
[1] 夏益霖. 多轴振动环境试验的技术、设备和应用[J].导弹
与航天载运技术，1996，6:52-59.
XIA Yilin. The technology equipment and application of
multi-axis vibration environment testing [J]. Missiles and
Space Vehicles,1996, 6:52-59.
[2] Habtour E, Connon W S, Pohland M F, et al. Review of response and damage of linear and nonlinear systems under multiaxial vibration [J]. Shock and Vibration, 2014: 1-21.
[3] Freeman. M T. 3-axi vibration test system simulates real word [J]. TEST Engineering and Management, 1990, 91: 10-14.
[4] Whiteman, W E. Inadequacies in uniaxial stress screen vibration easting [J]. Journal of the IEST, 2001, 44 (4): 20-23 .
[5] Whiteman W E, Berman M S. Fatigue failure results for multi-axial versus uniaxial stress screen vibration testing [J]. Shock and vibration, 2002, 9(6): 319-328.
[6] French, R M , Handy R, Cooper H L. Comparison of simultaneous and sequential single axis durability testing [J]. Experimental Techniques, 2006, 30(5):32-35.
[7] Ernst M, Habtour E, Dasgupta A, et al. Comparison of electronic component durability under uniaxial and multiaxial random vibrations [J]. Journal of Electronic Packaging, 2015, 137 (1): 1-8.
[8] 贺光宗，陈怀海，贺旭东. 一种多轴向随机激励下结构疲劳寿命分析方法[J]. 振动与冲击, 2015, 34 (7):59-63.
HE Guangzong, CHEN Huaihai, HE Xudong. A Vibration fatigue life prediction method of the structure under multi-axial random excitation [J]. Journal of Vibration and Shock, 2015, 34 (7):59-63.
[9] Paulus M ,Doughty K. Effect of resonant frequency shifting on time to failure of a cantilevered beam under vibration [J]. Journal of the IEST. 2010,53(1):59-68.
[10] 唐振杰，史展飞，胡海涛. 不同频率激励下 LY12 铝合金悬臂梁的疲劳特性[J]. 材料科学与工程学报, 2012, 30 (3): 384-388.
TANG Zhenjie, SHI Zhanfei, HU Haitao. Fatigue properties of LY12 cantilever beam under diffferent vibration frequencies [J].Journal of Materials Science& Engineering, 2012,30(3):384-388.
[11] Füllekrug U, Sinapius M. Simulation of multi-axis vibration in the qualification process of space structure [C]. 2nd Int. Symp. Environmental Testing for Space Programmes. 1993, 143-151.
[12] Füllekrug U. Utilization of multi–axial shaking tables for the modal identification of structures [J]. Philosophical Transactions of the Royal Society of London A: Mathematical, Physical and Engineering Sciences, 2001, 359 (1786): 1753-1770.
[13] 陈颖，朱长春，李春枝，等. 典型结构在单、多轴随机振动下的动力学特性对比研究[J]. 振动工程学报，2009，22(4)：386-390.
CHEN Ying,ZHU Changchun, LI Chunzhi, et al. Comparison of dynamic characteristics of a typical structure under single-axial and multi-axial random vibration loads[J]. Journal of Vibration Engineering, 2009, 22(4):386-390.
[14] Wijker J J. Random vibrations in spacecraft structures design: theory and applications[M]. Springer Science & Business Media, 2009.
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