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論文
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長屋, 幸助 ; 中田, 貴隆 ; 武田, 定彦
概要:
application/pdf<br />Journal Article<br />This paper deals with a method for solving dynamic stress problems of a non-cylindrical viscoelastic coil spring subjected to base excitations. The analysis considers the effects of ends of the
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coil, and applies the three dimensional curved beam theory for obtaining the exact solution of the element of the coil. The resultant forces and the resultant moments in the vibrant coil are decided by means of the transfer matrix method for an arbitrary shape. Both the shear and the normal stresses are obtained by use of the curved beam theory as just mentioned. Numerical calculations have been carried out for two cases of a barrel spring and a hyperboloidal spring.
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| 2.
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論文
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長屋, 幸助
概要:
application/pdf<br />Journal Article<br />This paper presents the theoretical results of the stresses in a coil spring of arbitrary cross section. The analysis consists of two parts one of which is concerned with the displacements,
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the angles of rotation, the resultant forces and the resultant moments which occur in a helical spring during the loading. The results in this problem are derived by application of the curved beam theory in which all displacements and all forces in three orthogonal directions of the coil spring are included with consideration of constraints of the edges of the spring. At the second step, the paper presents the expressions for stresses in the spring due to the compression in the direction of the axis of the cylindrical spring when both edges are kept to be parallel during the deformation by use of the author's results given in the preceding paper (1st report). Numerical calculations have been carried out for four cases of a circular cross-section spring, an elliptical cross section spring, a rectangular cross section spring and an oval section spring.
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| 3.
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論文
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長屋, 幸助 ; 武田, 定彦 ; 中田, 貴隆
概要:
application/pdf<br />Journal Article<br />This paper is concerned with the method for analyzing the vibration of coil springs with arbitrary shape. In the analysis, the field transfer matrix is derived from the solution of the
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foundamental equation of the curved beam theory. The transfer matrix is given by combining this field transfer matrix and the point transfer matrix. The analysis derives the frequency equation which is applicable to the coil spring of general shape. Numerical calculations have been carried out for HYPERBOLOIDAL springs and barrel springs. Experimental tests are also carried out to verify the present theoretical results.
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論文
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長屋, 幸助
概要:
application/pdf<br />Journal Article<br />円筒コイルばねの素線が任意形状断面を有する場合の素線内応力を求める解析解を誘導した.解析では中心圧縮ばねを考え, まず真直棒のねじり, せん断, 曲げによる
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応力をフーリエ展開境界値平均法により求め, ついで曲がり帽の理論を適用して素線の曲がりの影響を導入した. 本結果はばね素線断面境界の座標値のみを数値計算の過程でデータとして導入するだけで, あらゆる断面形状のばね素線内の応力を求める一般式である.
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| 5.
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論文
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佐藤, 雅志 ; 長屋, 幸助 ; 武田, 定彦 ; 松本, 幸夫 ; 斎藤, 純幸 ; 森田, 国樹
概要:
application/pdf<br />Journal Article<br />第一報で与えた理論結果を用いて異形断面ばねの数値計算を行い, また実験をも行い,第1報の結果が実用上十分な精度を有することを確認した. 次に卵形断面ばねを新
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たに開発し, 理論値と実験値との比較検討を行うとともに, 従来の円形断面ばねとの比較も行い, 卵形ばねがより優れた機能部品となることを明らかにした. さらにだ円形断面ばねならびに丸コバ断面ばねの開発をも行い, 異形断面ばねの系統的設計法を確立した.
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