圆弹簧与橡胶垫组合系统的横向刚度研究

In order to analyze lateral stiffness of circle spring with rubber pads mixed system, based on shear mode coefficient of solid circle and hollow thin-wall circle section, shear mode coefficient of hollow circle section with different ratios between inner and outer diameter was obtained by difference method. Taking circle spring and rubber pad as elastic strsight bar, relations between forces and bending moments and displacements and rotation angles on end surfaces of circle spring and rubber pads was set up by means of curve differential equations of elastic straight bar with uniform section. Lateral stiffness of circle spring with rubber pads mixed system was obtained by considering that the rubber pads are different. Calculation results show that lateral stiffness calculated by the method is very close to those by test. Several common methods, which are used to calculate lateral stiffness of circle spring with rubber pads mixed system, were compared and researched. Calculation results show that in order to obtain accurate solution, correction factor of stiffness matrix must be considered when only lateral stiffness of spring is calculated, but the correction factor must not be considered when lateral stiffness of spring with rubber pads mixed system is calculated.