In some engineering applications, the static deflection of the spring is usually used as an important parameter. The static deflection of spring refers to the deformation of spring without external force, which is usually expressed by slope. Specifically, when a certain load is applied at both ends of the spring, the static deflection of the spring can be calculated according to the relationship between the applied load and the compression or extension of the spring.
The static deflection of the spring can be used to calculate the required deviation of the spring and the deformation of the material, as well as the parameters such as friction and resistance produced during the running of the vehicle.