一种微幅隔振器的阻尼力机理分析

文章对一种微幅隔振器的阻尼力机理进行了研究,给出了牛顿流体阻尼力理论计算公式,提出了有效直径的概念。利用Fluent软件对该种微幅隔振器进行了仿真,结果表明:阻尼力与等效活塞运动时间无关,且局部阻尼力相比于沿程阻尼力过小,可以忽略,修正并验证了阻尼力理论计算公式。通过阻尼腔的结构尺寸及修正系数确定了有效直径的数值,可为微幅隔振器的设计提供理论指导。

The damping mechanism of a kind of micro-isolator

This paper studies the damping mechanism of a kind of micro-isolator, deduces the theoretical formula for the damping force of Newton fluid, and proposes the concept of effective diameter. Utilizing the software Fluent, simulations are carried out for the micro-isolator. It is shown that the damping force does not depend on the time of equivalent piston＇s movement, and compared to the frictional damping force, the local damping force is very small and can be ignored, then the theoretical formula of the damping force is obtained and validated. The value of the effective diameter is determined by the size of the damping cavity and the correction coefficient, which can be used as a reference in the design of micro-isolator.