摘要
将振动台刚体模型、数学参数模型与夹具有限元模型相结合,建立振动试验仿真系统。借助Virtual.lab软件包分别建立电动振动台及夹具的刚体和有限元模型,并结合振动台动圈物理参数建立振动台数学参数模型,实现与Matlab/Simulink软件的联合控制,形成电动振动台虚拟振动试验仿真平台。以夹具的正弦扫描试验为例,研究仿真过程中传递函数求取及控制信号幅值提取的方法。结果表明,这种联合仿真方法能较好地模拟实物试验,并且也可使控制效果可视化。
A virttual testing simulation system based on the shaker rigid and parameterized models coupling with flexible body of the fixture is presented. The multi-body system which is composed by vibration shaker and the clamping fixture is built up using the software Virtual.lab. The damping fixture is modeled with finite element method. The shaker is modeled using rigid body. Considering the physical parameters of the armature, the control simulation using the software Maflab / Simulink is coupled into the Virtual. lab to finish the closed-loop control vibration testing. Then the virtual sine sweep testing for the clamping fixture is presented. In the simulation, the methods to obtain the transfer function of the system and the extraction of amplitudes of the output signals are also discussed. Results show that the virtual shaker model can simulate the real vibration test well, and the technique proposed can also virtually display the process of the vibration testing.
出处
《机械强度》
CAS
CSCD
北大核心
2010年第1期30-34,共5页
Journal of Mechanical Strength
关键词
虚拟试验
正弦扫描
振动台
Virtual test
Sine sweep
Vibration shaker
