Theoretical and experimental researches on nonlinear elastic tension property of rubber isolators

The tension property theory of rubber bearings is researched in the paper. A series of basic concepts, such as origin tension longitudinal elastic modulus,tension stiffness factor, origin tension stiffness and biasing tension origin stiffness are suggested with corresponding theoretical formula and testing estimation method. Based on the origin tension stiffness and biasing tension origin stiffness, the deformation calculating theory related to pure tension state and shear- tension state of isolating bearing is established. The vertical stiffness, biasing tension origin stiffness and deformation tests are performed with gun rubber bearings and lead plug rubber bearings, in order to verify the new concepts and computation model of rubber isolators. All test results show that the theory established in the paper is an effective theory to analyze the tension stiffness and tension deformation of rubber isolators.