For the design and failure analysis of the dynamic characteristics of the spiral blade structure, it is necessary to involve its modal characteristics in the fluid. Let's take a look at the methods to obtain:
Currently, there are generally two methods for solving the modal characteristics of blades in fluids. One is to multiply the natural vibration frequency of the blade in the air by an empirical influence coefficient to obtain the natural vibration frequency in the liquid. This is different from the actual situation. If the error is large, another method is to use the additional mass method to equate the force of the fluid on the blade to mass, that is, the blade assembles additional mass in the fluid to approximately realize the force transmission.
When the mixer blade is in the working environment, the vibration of the blade will inevitably cause the fluctuation of the glue pressure. At the same time, the fluctuation of the glue pressure will affect the vibration of the mixer blade, forming a fluid-solid combination of the interaction between the spiral blade and the glue. system.
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