SMA-MR材料减振器温度力学特性研究

Study on Temperature Mechanical Properties of SMA-MR Material Dampers

摘要:

本文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,分析其在不同温度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减振器的力学特性受温度影响呈现一定的规律性,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。

关键词:SMA-MR;等效刚度;能量耗散系数;试验研究

Abstract:

In this paper, 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) which was made of Ni-Ti alloy wire processed by coil spring ,cold stamping and post-treatment damper is designed. Through theoretical and experimental research on SMA-MR dampers, the equivalent rigidity and energy dissipation coefficient of the damping system at different temperatures are analyzed. The law of mechanical properties of SMA-MR material with temperature is studied. Using the experimental results to analyze the relationship between equivalent rigidity, energy dissipation coefficient and temperature. The research results show that the mechanical and damping properties of SMA-MR dampers are subject to certain regularity due to temperature. The analysis results provide theoretical basis and data reference for the design of SMA-MR dampers and their application under extreme environment.

Key words:SMA-MR; equivalent rigidity; energy dissipation coefficient; experimental research