Abstract: The stress relaxation experiment of helical spring used in missile systems was carried out. The equation of the stress relaxation for the spring stored in room temperature was obtained.The reliable experimental basis of the quality judgement and life extending for the missile systems was provided.

Key words: Engine accessory;Helical spring;Stress relaxation;Experimental stress analysis

摘要： 对导弹弹体及发动机中常用的压缩螺旋弹簧进行了应力松弛实验研究，得到了这种弹簧在常温下长期贮存中的应力松弛方程，为导弹武器系统的质量评判和延寿提供了可靠的实验依据。

关键词: 发动机附件;螺旋弹簧;应力松弛;实验应力分析