新型复合粘弹阻尼器不同加载波下的性能研究

Research on Performance of New Viscoelastic Damper Under Different Loading Waves

为了研究新型复合粘弹阻尼器在不同加载波下的力学性能,分别对其施加正弦波与三角波进行抗疲劳与变幅相关性试验,比较2种加载波下新型复合粘弹阻尼器的力学性能变化规律。结果表明:新型复合粘弹阻尼器,在抗疲劳试验中正弦波加载下的力学性能优于三角波加载;变幅试验中,随着应变幅值的增大,三角波加载下的最大剪应力、存储剪切模量和等效刚度均优于正弦波加载,但等效阻尼比小于正弦波加载。

In order to study the mechanical properties of the new composite viscoelastic damper under different loading waves,the anti-fatigue test and amplitude correlation test were carried out by applying sine wave and triangle wave respectively,and the variation law of mechanics properties of new composite viscoelastic damper under two loading waves was compared.The results showed that,the new composite viscoelastic damper had better mechanical properties under the sine wave loading in the fatigue resistance test than the triangular wave loading,and in the amplitude test,as the strain amplitude increases,the maximum shear stress and storage under the triangular wave loading,the shear modulus and equivalent stiffness were better than sine wave loading,but the equivalent damping ratio was less than sine wave loading.