金属丝网减振器的建模与参数识别

Mechanical Modeling and Parameter Identification of the Metal-net Vibration Absorber

针对金属丝网减振器的滞迟特性和非线性关系,利用金属丝网减振器的静态特性试验得到载荷-位移曲线,并由此建立了金属丝网减振器的滞迟恢复力模型,将恢复力g_n分解为无记忆部分g_0和记忆部分z(t),并分别用间接Fourier展开法和直接Chebyshev展开法对减振器双折线本构关系进行级数展开和参数辨识,通过参数识别数值模拟得出Chebyshev级数展开识别法的精度略胜一筹,为建立金属丝网减振器非线性泛函本构关系与动力学模型提供了坚实的实验基础和理论指导。

For tlie metal-net vibration absorl）er of hysteretic characteristics and nonlinear relationship,the staticcharacteristic test of metal-net vibration absorber to get the load-displacement curve,and estastoring force model. Decomposing the restoring force with t . into no memory parts with T0 a d memory parts with＋ A ,Qt indirect method of Fourier series and direct method of Chebyshev series for vibration absorber doublebroken line constitutive relation for series expansion and parameter identification,througof series expansion identification method of Chebyshev series identification precision is slightly better,in order toestablish the metal-net vibration absorber constitutive relation of nonlinear functional and dynamic model provides asolid experimental basis and theoretical guidance.