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首页> 外文期刊>Proceedings of the institution of mechanical engineers >The non-ideal problem behavior using a dynamic vibration absorber with nonlinear essential stiffness and time-dependent damping properties
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The non-ideal problem behavior using a dynamic vibration absorber with nonlinear essential stiffness and time-dependent damping properties

机译：使用具有非线性基本刚度和时变阻尼特性的动态吸振器的非理想问题行为

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The purpose of this study is to develop a dynamic vibration absorber using viscoelastic material with nonlinear essential stiffness and time-dependent damping properties for a non-ideal vibrating system with Sommerfeld effect, resonance capture, and jump phenomenon. The absorber is a mass-bar subsystem that consists of a viscoelastic bar with memory attached to mass, in which the internal dissipative forces depend on current, deformations, and its operational frequency varies with limited temperature. The non-ideal vibrating system consists of a linear (nonlinear) oscillator (plane frame structure) under excitation, via spring connector, of a DC-motor with limited power supply. A viscoelastic dynamic absorber modeled with elastic stiffness essentially nonlinearities was developed to further reduce the Sommerfeld effect and the response of the structure. The numerical results show the performance of the absorber on the non-ideal system response through the resonance curves, time histories, and Poincare sections. Furthermore, the structure responses using the viscoelastic damper with and without memory were studied.
机译：这项研究的目的是为具有Sommerfeld效应，共振捕获和跳跃现象的非理想振动系统开发一种使用具有非线性基本刚度和随时间变化的阻尼特性的粘弹性材料的动态吸振器。吸收器是一个质量棒子系统，由粘弹性棒组成，该棒具有附着到质量上的内存，其中内部耗散力取决于电流，变形，其工作频率随温度的变化而变化。非理想振动系统由线性（非线性）振荡器（平面框架结构）组成，该振荡器通过弹簧连接器在电源受限的情况下通过弹簧连接器进行励磁。开发了一种以弹性刚度为基本非线性模型的粘弹性动态吸收器，以进一步降低Sommerfeld效应和结构响应。数值结果通过共振曲线，时间历史和庞加莱截面显示了吸收体对非理想系统响应的性能。此外，研究了使用带和不带记忆的粘弹性阻尼器的结构响应。

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