中文摘要：

采用数值模拟方法和动网格技术，计算在黏性不可压流体中圆球做变加速运动时的附加质量、阻力和阻力因数，研究在管体域中圆球变加速运动对附加质量、阻力和阻力因数的影响．计算结果表明：管体域中的附加质量、阻力及阻力因数均大于无限域中的结果，无限域中的结果大于理论解．在减速阶段，当圆球为先加速后减速运动时，管体域中的附加质量较大，但在加速阶段运动圆球的阻力较大，阻力因数比较接近；在两个阶段中所有参数都在出管体处变小，说明运动区域、加速度和流体黏性对附加质量、阻力及阻力因数均有较大影响．

英文摘要：

The added mass, drag and drag factor of a varying accelerated motion ball in viscous incompressible fluid are calculated by numerical simulation and dynamic mesh method. The effect of varying accelerated motion on the added mass, drag and drag factor of the ball in a tube domain is researched. It is shown that, the added mass, drag and drag factor in tube domain are bigger than those in infinite domain; the results in infinite domain are bigger than the theoretical results. As to the decelerated motion phase, the added mass in tube domain is bigger when the ball motion is accelerated first and then decelerated, but the drag of the ball is bigger in the acceleration process, and the drag factor are nearly the same in both the phases; all the parameters become smaller when the ball is leaving the tube in both the phases. It indicates that the motion domain, acceleration and fluid viscosity have strong effect on the added mass, drag and drag factor.