应用改进型摩擦模型的隔振吊架动力特性研究  

Dynamic Characteristics Analysis of Vibration Isolation Hanging with Advanced Friction Model

作　　者：吕顺日[1] 华宏星[1] 

机构地区：[1]上海交通大学机械系统与振动国家重点实验室,上海200240

出　　处：《噪声与振动控制》2012年第4期169-172,共4页Noise and Vibration Control

摘　　要：研究一种新型吊架的隔振特性。引入改进型Stribeck摩擦模型,该模型综合考虑正压力及相对速度对滑动摩擦力的影响,由此得到在宏观滑动条件下的摩擦力函数。根据改进的摩擦模型设计吊架结构,使用Runge-Kutta数值方法计算该吊架的自由响应、强迫响应及冲击响应。结果表明:该型吊架在余弦激励作用下,对高幅值(30 mm)低频段ω=0.1ωn→ωn和低幅值(5 mm)高频段ω=1.4ωn→6ωn这两种的工作状态均有良好的隔振能力。表明该系统也具备了一定的抗冲击能力。In order to investigate hanger＇ s characters of auto-adaptation vibration isolation, it was used the promoted Stribeck friction model in which the effects of both pressure and relative velocity to the glide friction force influence were concerned. According to the improvement of the friction model frame structure design, Runge-Kutta numerical method was used to calculate the hanger free response, forced response and the shock response. Results indicate that the excitation of the hanger in cosine, both for high amplitude （30 mm） low frequency ω=0.1wn→wn and low amplitude （5 mm） w = 1.4 to → 6 w. hase good isolation. Also, it indicates that the system has a certain amount of resistance to shock.

关 键 词：振动与波 Stribeck 摩擦阻尼 RUNGE-KUTTA法 隔振抗冲 

分 类 号：TB535.1[理学—物理]