Random Vibration Structure Fatigue Analysis Based on Finite Element Simulation

Abstract:

In order to analyze the fatigue of the airborne product structure, the modal analysis and random vibration analysis are conducted for the product by using the finite element analysis software ANSYS. The modal analyzing results are compared with the modal test results and the finite element model is corrected. The stress response power spectral density is obtained from random vibration analyzing. A frequency domain method for calculating the fatigue damage of the structure is presented. The simulation results are in agreement with the reliability enhancement testing results. An optimization scheme for the product structure design is given.

• Periodical: Advanced Materials Research (Volumes 875-877)
• Pages: 2078-2086
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.875-877.2078
• Online since: February 2014
• Authors: Long Tao Liu, Chuan Ri Li, Shuang Long Rong, You Gang Jin
• Keywords: Fatigue Damage, Finite Element Analysis (FEA), Frequency Domain Method

References

[1] Halfpenny A. A frequency domain approach for fatigue life estimation from finite element analysis. In: Gilchrist MD, DulieuBarton JM, Worden K, editors. DAMAS 99: Damage Assessment of Structures; vol. 167-1 of Key Engineering Materials. 1999, pp.401-410.

DOI: 10.4028/www.scientific.net/kem.167-168.401

[2] Zhao W, Baker MJ. On the probability density function of rainflow stress range for statonary gaussian processes. Int J Fatigue 1992; 14(2): 121-135.

DOI: 10.1016/0142-1123(92)90088-t

[3] Bendat J.S. Probability function for random responses prediction of peak[J], fatigue damage and catastrophic failures, Tech. rep., NASA, (1964).

[4] Yan Yunfei. An Efficient Calculation Method of Fatigue Life of Welded Structures under Random Load [J]. Chinese Journal of Mechanical Engineering, 1993, 29, 2, 7-12.

[5] Wang Mingzhu. Research on Life Analysis Method for Structure Vibration Fatigue[D]. Nanjing: Nanjing University of Aeronautics and Astronautics, (2009).

[6] Palmgren A. Die lebensdauer von kugellagern. VDI-Zeitschrift1924; 68: 339-341.

[7] Miner M.A. Cumulative damage in fatigue[J]. Journal of Applied Mechanics, 1945: 159-164.

[8] Christian Lalanne. Mechanical Vibration &Shock Sinusoidal Vibration[M]. Istel/Hermes Science Pub, 2009: 229-248.

[9] Ghao Z, Moan T. Frequency-domain fatigue analysis of wide-band stationarygaussian processes using a trimodal spectral formulation. Int J Fatigue2008; 30(10-11): 1944-(1955).

DOI: 10.1016/j.ijfatigue.2008.01.008

[10] Li Deyong, Yao Weixing. Nominal stress approach for life prediction of notched specimens under vibration loading[J]. Acta Aeronautica et Astronautica Sinica, 2011, 32(11): 2036-(2041).

[11] Dirlik T. Application of computers in fatigue analysis[D]. Coventry: Department of Engineering, University of Warwick, (1985).

[12] Yang Wanjun, Shi Rongming. Research on random vibration fatigue life prediction method[C]. The Tenth Session of the Proceedings of the National Conference on Theory and Application of Vibration, 2011: 167-172.

[13] Robin Alstari Amy, Guglielmo S. Aglietti, Guy Richardson. Accuracy of simplified printed circuit board finite element models[J]. Microelectronics Reliability 2010(50): 86-97.

DOI: 10.1016/j.microrel.2009.09.001

[14] Fei Xu, Chuanri Li, Tongmin Jiang. Dynamic modeling and vibration analysis of airborne electronic cases[C]. Computational Intelligence and Bioinformatics Proceeding, 2011: 7-11.

DOI: 10.2316/p.2011.755-007

[15] Jeong Kim, Joo-Cheol Yoon, Beom-Soo Kang. Finite element analysis and modeling of Structure with bolted joints[J]. Applied Mathematical Modeling, 2007, 31, 895-911.

DOI: 10.1016/j.apm.2006.03.020