The Finite Element Method (F.E.M.) was used to study the static and dynamic behaviour of half-annular reeds with and without a backing plate. Static displacements and stresses were evaluated and the reed shapes and frequencies were derived when vibrating freely. The convergence of the analytical solutions was examined. The predicted mode shapes and natural frequencies were in good agreement with experimental results obtained by time-averaged laser holography. Dynamic displacement and stress patterns were calculated when a reed was subjected to a variable pressure difference during the suction or discharge phases of a compressor cycle. Significant secondary effects were considered.
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