※一部利用できない機能があります
| 1.
論文 |
論文
|
長屋, 幸助
概要:
application/pdf<br />Journal Article<br />This paper discusses transient stresses in a general shaped three dimensional curved rod with an arbitrary cross section subjected to general transient excitation. The paper gives and
…
analytical method for finding normal and shear stresses in the rod by use of the transfer matrix, the Laplace transform, the Fourier expansion and the Fourier expansion collocation methods based on the there dimensional curved beam theory. As an application, this paper treats the coil spring of an arbitrary cross section, and proposes a rational coil spring having an oval cross section. It is clarified that the oval cross section coil with an appropriate aspect ration has various advantages as compared with the circular cross section spring.
続きを見る
|
||
| 2.
論文 |
論文
|
永井, 健一
概要:
application/pdf<br />Journal Article<br />This paper presents a method for the suppression of large amplitude bending vibrations of a clamped curved beam by controllable forces in an elastic support. The elastic support force, acting on
…
the middle span of the beam, is generated by the electromagnet. Applying the Galerkin method to the basic equations, non-linear coupled differential equations are reduced: the forced responses are calculated utilizing the harmonic balance method. From the analytical results, it is shown that natural frequencies are easily shifted away from the resonant frequency by the changeable support forces. Experimental work has also been carried out to clarify the validity of this control method. It is found that the experimental results are good agreement with the analytical ones.
続きを見る
|
||
| 3.
論文 |
論文
|
長屋, 幸助 ; 後藤, 徹朗
概要:
application/pdf<br />Journal Article<br />This paper presents a method for analyzing three-dimensional curved rods of general shape without symmetric axes. In the analysis, the exact solutions of the equlibrium equations for three
…
dimensional curved rods have been obtained first, then the transfer matrix has been derived based on the exact solution with consideration of inertia forces. The analytical equations for finding the eigenfrequencies and mode shapes have been given. Numerical calculations have been carried out for three dimensional circular, elliptical, and parabolic spiral rods of circular and square cross sections without symmetric axes.
続きを見る
|
||
| 4.
論文 |
論文
|
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,
…
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.
続きを見る
|
