Static and thermal loads in full size grain bins predicted by vectorized FEM on supercomputer

Q. Zhang, Virendra Puri, H. B. Manbeck

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

The second generation finite element model (FEM) was vectorized on CYBER 205 supercomputer to predict static and thermally induced bin wall pressures in full size grain bins filled with wheat. The load response of three steel bins - 3 m, 6.4 m and 9 m in diameter, respectively, and 9 m in height were studied using the FEM. The three, height to diameter ratios encompassed shallow and deep bin regimes. The FEM predicted static pressures compared favorably with the Janssen static pressure theory for all three bins. The mean square error between Janssen and FEM was in the 0.7 to 1.6 kPa range. The FEM predictions indicated that thermal lateral bin wall pressure increased with grain depth. Thermal lateral overpressures averaged over grain depth were 7.4%, 7.0% and 7.4% of static pressures at 10 C, 14.7%, 14.0% and 14.3% at 20 C and 21.9%, 21.1% and 21.2% at 30 C temperature drop for 3 m, 6.4 m and 9 m bins, respectively.

Original languageEnglish (US)
Pages (from-to)685-690
Number of pages6
JournalTransactions of the American Society of Agricultural Engineers
Volume32
Issue number2
StatePublished - Mar 1989

All Science Journal Classification (ASJC) codes

  • Agricultural and Biological Sciences (miscellaneous)

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