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CLC number: S661.2; TH113; O241.82

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Received: 2006-01-04

Revision Accepted: 2006-03-30

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Journal of Zhejiang University SCIENCE B 2006 Vol.7 No.6 P.491-496


Studies on vibration characteristics of a pear using finite element method

Author(s):  SONG Hui-zhi, WANG Jun, LI Yong-hui

Affiliation(s):  Department of Biosystems Engineering, Zhejiang University, Hangzhou 310029, China

Corresponding email(s):   songhz@citiz.net

Key Words:  Pear, Vibration characteristics, Unsymmetrical and un-spherical model, Finite element analysis

SONG Hui-zhi, WANG Jun, LI Yong-hui. Studies on vibration characteristics of a pear using finite element method[J]. Journal of Zhejiang University Science B, 2006, 7(6): 491-496.

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author="SONG Hui-zhi, WANG Jun, LI Yong-hui",
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T1 - Studies on vibration characteristics of a pear using finite element method
A1 - SONG Hui-zhi
A1 - WANG Jun
A1 - LI Yong-hui
J0 - Journal of Zhejiang University Science B
VL - 7
IS - 6
SP - 491
EP - 496
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Y1 - 2006
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.2006.B0491

The variation of the vibration characteristics of a Huanghua pear was investigated using finite element simulations. A new image processing technique was used to obtain the unsymmetrical and un-spherical geometrical model of a pear. The vibration characteristics of this type of pear with the correlation of its behavior with geometrical configurations and material characteristics were investigated using numerical modal analysis. The results showed that the eigenfrequency increased with the increasing pear Young’s modulus, while decreased with increasing pear density, and decreased with increasing pear volume. The results of this study provided foundation for further investigations of the physical characteristics of fruits and vegetables by using finite element simulations.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


[1] Abbott, J.A., Lu, R., 1996. Anisotropic mechanical properties of apples. Transactions of the ASAE, 39(4):1451-1459.

[2] Abbott, J.A., Bachman, G.S., Childers, N.F., Fiztgerald, J.V., Matusik, F.J., 1968. Sonic techniques for measuring texture of fruit and vegetables. Food Technology, 22:635-645.

[3] Abbott, A.J., Affeldt, A.H., Liljedahl, A.L., 1992. Firmness measurement of stored ‘Delicious’ apples by sensory methods, Magness-Taylor, and sonic transmission. Journal of the American Society for Horticultural Science, 117:590-595.

[4] Chen, H., de Baerdemaeker, J., 1993a. Madal analysis of the dynamic behavior of pineapples and its relation to fruit firmness. Transactions of the ASAE, 36(5):1439-1444.

[5] Chen, H., de Baerdemaeker, J., 1993b. Finite-element-based modal analysis of fruit firmness. Transactions of the ASAE, 36(6):1827-1833.

[6] Chen, H., de Baerdemaeker, J., Bellon, V., 1996. Finite element study of the melon for nondestructive sensing of firmness. Transactions of the ASAE, 39(3):1057-1065.

[7] de Belie, N., Schotte, S., Coucke, P., de Baerdemaerker, J., 2000. Development of an automated monitoring device to quantify changes in firmness of apple during storage. Postharvest Biology and Technology, 18(1):1-8.

[8] Dewulf, W., Jancsók, P., Nicolaï, B.M., de Roeck, G., Briassoulis, D., 1999. Determining the firmness of a pear using finite element modal analysis. Journal of Agricultural Engineering Research, 74(3):217-224.

[9] Jancsok, P.T., Clijmans, L., Nicolai, B.M., de Baerdemaeker, J., 2001. Investigation of the effect of shape on the acoustic response of ‘conference’ pears by finite element modeling. Postharvest Biology and Technology, 23(1):1-12.

[10] Langenakens, J., Vandewalle, X., de Baerdemaeker, J., 1997. Influence of global shape and internal structure of tomatoes on the resonant frequency. Journal of Agricultural Engineering Research, 66(1):41-49.

[11] Lu, R., Abbott, J.A., 1997. Finite element modeling of transient responses of apples to impulse excitation. Transactions of the ASAE, 40(2):1395-1406.

[12] Petrell, R.J., Mohsenin, N.N., Wallner, S., 1980. Dynamic mechanical properties of the apple sortex in relation to sample location and ripening. Journal of Texture Studies, 10(3):217-229.

[13] Schotte, S., de Belie, N., de Baerdemaerker, J., 1999. Acoustic impulse-response technique for evaluation and modeling of firmness of tomato fruit. Postharvest Biology and Technology, 17(2):105-115.

[14] Teng, B., 2002. Studies on the Characteristics of Frequency of Pear and Peach. Master Thesis Dissertation, Zhejiang University, China (in Chinese).

[15] Verstreken, E., de Baerdemaeker, J., 1994. Evolution of maturity of peaches: non-destructive firmness measurement from the acoustic impulse response. International Agrophysics, 8:469-473.

[16] Wang, J., 2003. Anisotropic relaxation properties of pear. Biosystems Engineering, 85(1):59-65.

[17] Wang, J., Sheng, K.C., 2005. Variations in firmness and sugar content in ‘Huanghua’ pear (Pyrus pyrifolia ‘Nakai’). Journal of Horticultural Science and Biotechnology, 80(3):307-312.

[18] Wang, J., Teng, B., Yu, Y., 2004a. Pear dynamic characteristics and firmness detection. European Food Research and Technology, 218(3):289-294.

[19] Wang, J., Teng, B., Zhou, M., 2004b. Dynamic response of impact forces on pear. Transactions of the Chinese Society for Agricultural Machinery, 35(2):65-68.

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