摘要
吊耳是汽车排气系统的隔振关键部件,其动静态特性直接影响隔振性能。用非线性有限元数值计算方法研究一种典型吊耳动静态特性,首先建立吊耳有限元模型,选择合适本构模型,模拟吊耳的动静态特性并计算吊耳三向静刚度,再用不同频率正弦信号激励吊耳,模拟其动态特性并用互功率谱的方法计算动刚度和阻尼角;最后运用正交试验方法对吊耳进行结构优化,找出对吊耳动静态特性影响最大结构参数并得到优化方案,使得吊耳动静态特性满足要求,提高隔振性能。
Hanger isolators are the critical components of automobile exhaust system, and its static and dynamic elastic characteristics affect directly performance of vibration isolation. The static and dynamic elastic characteristics of a typical hanger isolator was investigated by using nonlinear Finite Element Method. Finite element model of the hanger isolator was established first, then suitable constitutive equations selected, static and dynamic elastic characteristics simulated and static stiffness of the hanger isolator in calculated. Under the sinusoidal excitation at different frequency the dynamic stiffness and damping angle were calculated by cross-power spectrum through dynamic simulation. Finally, the structure of the hanger isolator was optimized by orthogonal experiment to enhance performance of the isolator.
出处
《噪声与振动控制》
CSCD
2012年第5期193-197,共5页
Noise and Vibration Control
关键词
振动与波
吊耳
正交试验
隔振
动静态特性
互功率谱
vibration and wave
hanger isolator
orthogonal test
vibration isolation
dynamic and static elastic characterization
cross-power spectrum
作者简介
通讯作者：钱胜（1984-），男，安徽枞阳县人，硕士研究生，研究方向为噪声与振动控制。E—mail：qiansheng84@163．com；yiminlu@163．com
