抄録
In previous paper, Part I, response characteristics of three types of rectangular block in three kinds of nonshear flow or flow without velocity gradient-one is smooth flow and others are turbulent flows-were investigated. In this paper, the results in cases of three kinds of shear flow or flow with velocity gradient-one is turbulent flow with the exponent in power law being 1/4 and others are 1/8-are investigated. Main results are as follows. 1) In case of non-shear flow, great differences were found in the response characteristics between at lower reduced velocity and in vicinity of the critical reduced velocity, that is, in the former the response intensity increased monotonically with the velocity and in the later the self-excited vibration and the restricted vibration prior to it were observed. In case of shear flow, however, the response intensity increased monotonically with the velocity regardless of magnitude of the reduced velocity. 2) Not only in case of non-shear flow but also shear flow, the effect of the vortex-shedding on the response was guessed to be large.
