中文摘要：

针对速度为1．4～1．9km／s，长径比为20，在相同的质量和横截面积条件下，3种截面形状（三角形、四边形及圆形截面）的长杆体，对其垂直侵彻半无限靶板特性进行了试验研究．研究表明：在此速度范围区间，3种截面形状杆体的侵彻深度随速度变化趋势相同，但当着靶速度高于1．7km／s时，三角形截面杆的侵彻性能最好，四边形次之，圆形截面杆最差．

英文摘要：

The experiments that long rods of three kinds of sections （triangle, quadrangle and circular） penetrating semi-infinite target were studied under the same conditions of quality section area. In the experiments, the velocity of long rods were 1.4- 1.9 km/s, and the lengh-to-diameter ratio was 20. The research indicates that the change trends of penetrating depth with the change of velocity are accordant within the scope of velocity. The penetration mechanism of triangle section is the best when the speed exceeds 1.7 km/s, and the rod of the quadrangle section is the second. The rod of the circular section is the worst.