We analyzed the stress state of Harrington rod with Edwards sleeve (HRS) and Harrington rod of C type (HRC), and determined its dangerous cross section and dangerous point.

• 作者对Harrington棒加Edwards套棒（HRS）和C型Harington棒（HRC）两种改良型Harrington棒进行应力分析，确定出棒体的危险截面和危险点。