非接触形渦巻きばねの数値解析

抄録

In the analysis of the non-contact type spiral springs, several theories about Archimedean spiral beam with limited boundary conditions have already been reported. In this paper, we introduced the theory which can freely select boundary conditions without restriction on spring shape. Then we analyzed the Archimedean spiral beam and Logarithmic spiral beam, which are typical spring shapes, and considered the effect of various boundary conditions, e.g. bending moment amount, deflection angle, etc. Since this theory is analyzed in polar coordinates, so various boundary conditions can be easily given for analysis. Additionally, we introduce applied FEM method with arc beam elements to analyze springs that are not ideal shapes. The simulation results by theorical method were in good agreement with the simulation results by FEM method. We made a spring and compared the simulation and the experiment. The simulation results were in good agreement with the experimental results. Finally, we introduce proposed methods to improve the spring performance.