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将粘弹性材料与磁流变液智能材料相结合,研发了新型粘弹性阻尼器。该阻尼器可利用磁流变液的流变效应来补偿粘弹性材料的温度软化效应,使得阻尼器在任意环境温度下都能够保持最佳温度的耗能特性。介绍了新型粘弹性阻尼器的工作原理,完成了自制阻尼器的性能试验,在此基础上,提出了新型粘弹性阻尼器的力学模型并依据试验数据对模型进行了参数识别。试验与理论分析的结果表明,运用流变效应来补偿温度软化效应是完全可行的,提出的力学模型可以很好描述新型粘弹性阻尼器的动力特性,可以为后面的补偿控制提供理论依据。
A new type of viscoelastic damper has been developed by combining viscoelastic materials with magnetorheological fluids. The damper can utilize the rheological effect of magnetorheological fluid to compensate the temperature softening effect of the viscoelastic material so that the damper can maintain the optimal temperature energy dissipation property at any ambient temperature. The working principle of the new viscoelastic damper is introduced and the performance test of the self-made damper is completed. Based on this, the mechanical model of the new viscoelastic damper is proposed and the parameters are identified according to the experimental data. The experimental and theoretical analysis shows that it is feasible to use the rheological effect to compensate the temperature softening effect. The proposed mechanical model can well describe the dynamic characteristics of the new viscoelastic damper and provide a theoretical basis for the latter compensation control.