磁気ダンパに関する実用設計式の提案 : 長屋・小島の式の収束性の改善

概要

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This paper proposes a practical expression for design of a magnetic damper which is composed of a rectangular magnet and a rectangular conductor. This type of magnetic damper has already been discussed by Nagaya and Kojima. They derived an expression for calculating the damping coefficient of the magnetic damper. This expression contains two infinite series of functional terms : one is a simple series and the other is a double series. The convergence of these infinite series is very slow, so many calculations are required to obtain an exact value for the Nagaya-Kojima expression. We discovered that the limit value of these infinite series can be expressed using elementary functions. Thus the simple series reduces to a functional term, and the double series reduces to a simple series that converges quickly. As a result, the convergence of the Nagaya-Kojima expression is greatly improved, and the expression becomes a more practical one.
一般社団法人日本機械学会の論文
1995-02-25