This article summarized the fluid strength suspension development history and the structure type, simple introduction each kind of suspension physical model, dynamic characteristic and so on, follows the current the body mechanics angle to embark, through fifty-fifty the driving fluid strength suspension inertia channel in the fluid dynamics analysis, has established the semi-active fluid strength suspension internal pressure change movement differential equation, the damping force expression which obtained the fluid flows when the inertia channel produces. May see the fluid from the expression in the formula the material characteristic which in the inertia channel damping force and the fluid speed, the channel cross-sectional area, the passage length, the fluid selects and the strength related .
Through analyzes the semi-active fluid strength suspension the structure and the principle of work, establishes the semi-active suspension the physical model and the mathematical model, and before the union the article analysis obtains the damping force expression, solves to the semi-active fluid strength suspension moves the rigidity and moves the damping expression. Then has carried on the simulation to the fluid strength suspension dynamic characteristic, changes the dynamic characteristic simulation curve in turn after the analysis which semi-active fluid strength suspension inertia channel tube cross-sectional area S and the length l two parameters sizes obtains, was allowed to see the semi-active fluid strength suspension truly to make up the rubber suspension low frequency damping to be insufficient, high frequency moved the rigidity big shortcoming. From this may think changes the suspension dynamic characteristic through change inertia channel cross-sectional area s, then the change suspension vibration isolation performance is feasible.
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