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Speedy Stiffness modeling and designing of plane supporting spring

Electronic instruments for aeronautics and astronautics usually endure stronger impact or vibration under hostile environments, which results in the storage of more deformation energy within the isolators. Another necessary requirement comes from the limitation of the assembly space where the larger isolator is unallowable. Compared with other commonly used vibration isolators, a plane supporting spring is characterized by its greater deformation energy, lower stiffness, better static and dynamic characteristics. However; there exist some difficulties in modeling and designing the plane supporting spring. To solve the problems, a speedy modeling program of APDL (ANSYS Parameter Design Language) based on FEA software ANSYS is developed, which can rapidly establish a series of FEM analytical models of plane supporting spring with single or several spiral lines. Furthermore, the differences of the stiffness in each direction of plane supporting spring are analyzed on the basis of rapid modeling. In particular; axial stiffness and radius stiffness, especially the influencing factors of radius stiffness, are studied carefully. And finally, different spring assembly effects on radius stiffness are deeply explored.