Stiffness Matching of Cantilever Beam at Multipositions for Diaphragm Volume Pump Driving

Abstract

This study aims to enhance the energy output of a cantilever beam (CB) by employing an analytical approach centered on stiffness matching. First, a single spring with the simplest structure is used as the driving load, with the root, middle, and end of the CB as driving sources, establishing a multiposition driving model. Theoretical analysis and finite element simulations are then conducted to elucidate the correlation between the energy output at each driving position of the CB and the stiffness of the spring. Subsequently, in order to test and evaluate the external excitation performance of the CB, the load structure of which the output is easy to observe, test and quantify must be selected. A diaphragm volume pump (DVP) is, hence, chosen as the driving load instead of the spring. A CB-driven DVP structure is established, and dynamic model analysis and fluid-solid coupling simulation are conducted. Findings suggest that the optimal stiffness for the diaphragm to match with the CB decreases as the CB’s external output stiffness diminishes, irrespective of the CB’s operational mode. An experimental setup featuring the CB-driven DVP is constructed for empirical validation, and the experimental outcomes corroborate the simulation results.