【摘要】 以某型号飞行器用减振器性能研究为背景,设计了一种由NiTi合金丝经卷簧编织、冷冲压成型、后处理得到的新型记忆合金金属橡胶(SMA-MR)阻尼减振器。通过对SMA-MR减振器进行理论和试验研究,分析其在20～90℃温度环境下的等效刚度与能量耗散系数的变化情况,研究SMA-MR减振器的力学特性随温度变化的规律,利用试验结果,分析等效刚度、能量耗散系数与温度的关系。研究结果表明SMA-MR减振器的等效刚度随温度升高而升高,而能量耗散系数随温度升高而降低。分析结果为SMA-MR减振器的设计及特种环境下的减振应用提供理论依据与数据参考。更多还原

【Abstract】 Against the background of the research on the performance of dampers for a certain type of spacecraft, a new type of shape memory alloy metal rubber(SMA-MR) damper which was made of Ni-Ti alloy wire processed by coil spring, cold stamping and post-treatment was designed. Through theoretical and experimental research on SMA-MR dampers, the equivalent rigidity and energy dissipation coefficient of the damping system in the temperatures range of 20～90 ℃ were analyzed. The law of mechanical properties of SMA-MR material with temperature was studied. The relationship between equivalent rigidity, energy dissipation coefficient and temperature were analyzed using the experimental results. The results show that the equivalent rigidity of SMA-MR dampers increases with the increase of temperature while the energy dissipation coefficient of SMA-MR dampers decreases. The analysis results provide theoretical basis and data reference for the design of SMA-MR dampers and their application under extreme environment.更多还原