Designing a Dynamic Fluid-structure Interaction Simulation System for Hydraulic Vibration Absorber
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摘要: 通过现场试验,发现减振器在低速区动态效应明显,在最大速度点处可以忽略动态效应,并根据试验建立了阻尼力的计算公式。分析了Dytran的显式算法及其进行双向流固耦合计算的理论框架,探讨了降低流固耦合仿真计算规模和提高计算精度的方法,开发了筒式液压减振器瞬态双向流固耦合有限元分析系统。通过仿真分析获得了各速度点下的阻尼力值,其误差在10%以内,同时确定了筒内流场及空穴的分布。仿真模型可用于冲击载荷响应和流致振动研究。Abstract: To predict the damping force characteristics of a hydraulic vibration absorber,the dynamic fluidstructure interaction( FSI) simulation system was developed and tested. The test results show that the dynamic effects of the vibration absorber can be ignored when its velocity reaches the peak. The formula for calculating the damping force was developed. The explicit Dytran algorithm and the FSI computation theory were discussed. We also probed the ways of promoting the computational speed and precision. Then,the Dytran algorithm was employed to conduct the simulation. Through a series of simulations,we obtained the fluid field and the damping force vs.velocity characteristics. The simulation results show a good accordance with the test data.
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Key words:
- algorithms /
- calculations /
- cavitation /
- computer simulation
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