聚氨酯泡沫塑料振动性能的试验研究

设计了泡沫塑料隔振材料振动特性试验装置,对一种增强型聚氨酯泡沫塑料隔振材料进行了试验.试验 结果表明,泡沫塑料隔振材料的振动特性不仅与振幅有关,还与振动频率有关;恢复力同时受频率和振幅的影 响,并与变形历史有关,具有非线性滞后特性;在振动情况下运动中泡沫塑料表现出动刚度非线性和阻尼非线性 的特性,变化十分复杂. 

Experimental Investigation on Vibration Performance of Polyurethane Foam Plastic

An experimental device of the vibration performance of foam plastic was set up. The vibration test of a reinforced plastic material was carried out. Experimental results show that the vibration performance of this foam plastic material has relation not only to vibration amplitude but to exciting frequency. The restoring force of the foam plastic material is influenced by exciting frequency, vibration amplitude and deformation history. The foam plastic material has a nonlinear hysteretic characteristic. In vibration conditions, stiffness and damping characteristics of the foam plastic material are nonlinear. The research lays a foundation for modeling and parameters identification, dynamic design and dynamic optimization of the vibration-isolation material.