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Dynamic modeling and analysis of drum-type washing machine

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Abstract

In this study, dynamic analysis of a drum-type washing machine has been conducted using a simplified dynamic model considering gyroscopic effects. Its mathematical model has 6-degree of freedom in the complex coordinate space into which is transformed real coordinate space to understand the whirling motion easily. Dynamic analysis is performed using MATLAB. For the purpose of numerical verification, the results for unbalance response are presented and compared with the experimental vibration test. The mathematical model proves quite good accuracy in predicting dynamic characteristics which could be changed by the parameters of design variable and can reduce design cycle shortly. Dynamic characteristics of a washing machine are shown through shape and directivity index (SDI), whirling orbits, rigid and flexible mode of a drum type washing machine during drum run-up. In designing drum type of washing machine, it is efficient than finite element method to analyze behaviors of drum and tub.

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Abbreviations

θ s :

installation angle of spring

θ d :

installation angle of damper

m ub :

mass imbalance

K y bf :

y-direction stiffness coefficient of front bearing

K y br :

y-direction stiffness coefficient of rear bearing

m dc :

drum mass + laundry mass

m dr :

drum mass

m cl :

laundry mass

m sr :

shaft mass + rotor mass

m tw :

tub mass + counter mass

m bt :

stator mass

m tb :

tub mass

m cw :

counter weight mass

K ss :

stiffness coefficient of spring

C sd :

damping coefficient of damper

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Authors and Affiliations

  1. R&D Lab., Washing Machine Division, HA Company, LG Electronics, 76, Seongsan-dong, Changwon-city, Gyeongnam, South Korea, 641-713

    Hee-Tae Lim

  2. School of Mechanical Engineering, Pusan National University, San 30, Changjeon-dong, Keumjeong-gu, Busan, South Korea, 609-735

    Weui-Bong Jeong

  3. HAC Research Laboratory, LG Electronics, 327-23, Gasan-dong, Geumcheon-gu, Seoul, South Korea, 153-802

    Keun-Joo Kim

Authors
  1. Hee-Tae Lim
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  2. Weui-Bong Jeong
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  3. Keun-Joo Kim
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Correspondence to Weui-Bong Jeong.

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Lim, HT., Jeong, WB. & Kim, KJ. Dynamic modeling and analysis of drum-type washing machine. Int. J. Precis. Eng. Manuf. 11, 407–417 (2010). https://doi.org/10.1007/s12541-010-0047-7

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  • DOI: https://doi.org/10.1007/s12541-010-0047-7

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