【摘要】 该文研究了内部流体静压力对充液圆柱壳的频散特性的影响。静压力作为预应力计入壳体振动方程当中,壳体和流体分别采用Flügge方程和Helmholtz方程。结果表明,静压力对充液壳和未充液壳中传播波的影响一致,仅对第一支传播波有影响,并且使波数减小,周向模态数n较大时使起始频率升高;对其他各支传播波几乎没有影响。随着静压力和周向模态数的增大,对传播波的影响程度增大。更多还原

【Abstract】 The effect of internal hydrostatic pressure on frequency dispersion in cylindrical shells filled with fluid and without fluid are investigated.The hydrostatic pressure is modeled using static prestress terms in the shell equations of motion.The structural and fluid equations of motion are taken from Flügge’s thin shell theory and Helmholtz’s wave equation,respectively.The results show that with the increase of hydrostatic pressure,axial wave number of first branch of propagation wave will decrease in both shells filled with fluid and without fluid,and for high circumferential modes the cut-on frequency of first branch of propagation wave will increase.However,other branches of propagation wave are shown to be nearly independent of the hydrostatic pressure in both shells filled with fluid and without fluid.For higher pressure and larger circumferential mode order,the effect on wave number of first branch of propagation wave is more significant.更多还原