目的 针对整流罩分离系统的轻量化需求，设计开发了一种新型复合材料扭杆弹簧，较传统钢弹簧减重50%。方法 该设计利用内外管体的反方向扭转储存弹性势能，据此解析弹力与行程等结构参数的理论关系;根据弹力15 000 N、行程150 mm的实际应用要求，设计整套扭杆弹簧结构，并通过有限元仿真进行强度校核。结果 该结构所受应力在材料承受范围内，该设计方案能满足使用需求。结论 该设计适合用于火箭、导弹整流罩定向分离，大型设备振动防护和载具的悬挂稳定，为高性能弹簧的设计和制造提供了新的理论和实践基础。

In order to meet the lightweight requirements of a fairing separation system, the work aims to design and develop a novel composite torsion spring with weight decreasing by 50% compared to traditional steel springs. In this design, the opposite-direction torsion of the inner and outer tubes was utilized to store elastic potential energy, and based on this, the theoretical relationship between elasticity and stroke, as well as other structural parameters, was analyzed. In practical applications for the specified model, with a support reaction force of 15 000 N and a stroke of 150 mm, the entire torsion spring structure was designed and its strength was validated through finite element simulation. The stress borne by the structure was within the material bearing range, and the design scheme met the use requirements. This design is suitable for directional separation of rocket and missile fairing, vibration protection of large equipment, and suspension stability of high-speed vehicles. It provides a new theoretical and practical foundation for the design and manufacture of high-performance springs.