利用参数反演预测聚氨酯隔振器的蠕变曲线

摘要

用有限元对橡胶类材料制作的隔振器进行计算时，材料的某些参数确定非常困难。以某型在研聚氨酯隔振器为例，利用参数反演方法，预测其蠕变曲线。首先通过对聚氨酯材料的压缩蠕变试验进行模拟，利用实测压缩蠕变曲线反演确定相关蠕变参数；然后用这些蠕变参数模拟材料的剪切蠕变试验，以验证参数的合理性；最后将这些蠕变参数带入某型隔振器的蠕变计算中，预测出其蠕变曲线。%It is very hard to determine some material parameters during finite element calculation of isola-tors made of rubber.A polyurethane vibration isolator under development was taken as example and pa-rameter inversion method was used to predict creep curve.The compression creep tests of polyurethane material were performed,and related parameters were inversely determined due to the simulation of meas-ured creep curve.Then shear creep tests were simulated by using them to verify the rationality.Finally, these parameters were employed in the creep calculation to predict creep curve of a new isolator.