Several component mode synthesis methods with fixed, free and hybrid interface are used to compute the eigen solutions and the frequency response of a cyclic structure in combination with the cyclic symmetry properties. In particular, a procedure based on the use of a truncated basis of interface modes has been developed to reduce the number of interface coordinates in the component mode synthesis methods. Both classical and new methods provide very good results and are more efficient than the use of the cyclic symmetry properties only or the combination of the cyclic symmetry with the modal projection method for computing the forced response. For the eigen solutions, the free interface methods are more accurate than the fixed and the hybrid interface methods.

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