引信磁流变液解除保险机构贮存寿命评估方法

针对引信磁流变液解除保险机构贮存后使用的安全性和可靠性问题,提出一种贮存寿命评估方法,并对其进行寿命评估。通过贮存稳定性实验,分析在恶劣环境下存贮对磁流变液的屈服应力和黏度的影响以及对引信磁流变液解除保险机构的性能影响。实验结果表明长时间的高温会导致磁流变液中的铁磁颗粒沉降团聚,说明高温可加速引信磁流变液解除保险机构失效;通过建立贮存寿命加速模型,提出适用于引信磁流变液解除保险机构贮存寿命的评估方法;采用这种评估方法对引信磁流变液解除保险机构在正常贮存条件下的可靠贮存寿命进行评估。评估结果表明:引信磁流变液解除保险机构的可靠贮存寿命为15.2 a,具有较好的贮存性能,满足引信的可靠性和安全性要求。

Estimation Method for Storage Life of Magnetorheological Fluid Fuze Arming Device

An estimation method is proposed to study the safety and reliability of magnetorheological fluid (MRF) arming device using after a long-term storage, by which the storage life of MRF fuze arming device is estimated. The effect of harsh environment on the yield stress and viscosity of MRF and the performance of fuze arming device is analyzed through storage stability experiment. The experimental results show that a long-time high temperature results in sedimentating and aggregating the ferromagnetic particles in MRF, and speeding up the failure of MRF fuze arming device. An estimation method for the storage life of MRF fuze arming device is presented by establishing an accelerated storage life model. The reliable storage life of MRF fuze arming device under normal storage condition is estimated by the proposed method. The estimated results indicate that the reliable storage life of MRF fuze arming device is 15.2 years.