【摘要】 本文利用典型函数试验法对变速运动颗粒所受非恒定作用力（Ｂａｓｓｅｔ力和附加质量力）进行了深入分析和比较，结果表明：Ｂａｓｓｅｔ力对重质颗粒运动的影响很大，不能忽略；对于轻质颗粒，则以附加质量力的作用为主，Ｂａｓｓｅｔ力可忽略不计．更多还原

【Abstract】 A detailed examination of the non steady forces (Basset force and added mass force) acted on particles moving in arbitrary flow field is carried out using the typical function method. It is found that Basset force is important for the motion of heavy particles, and that for the motion of light particles, added mass force is dominant while Basset force is negligible.更多还原