Sahil Sura
Ansys Employee

Hello vijaykumar.chauhan,
 It all depends on your application and the constraints you want to define.
Springs can be used when stiffness behavior in a specific direction is observed.
You can define the appropriate type of joint depending on your requirement for degrees of freedom like translational or rotational.
The following references may serve helpful in understanding the behavior of Springs and Bushing joints, and you can model the rubber damper by setting appropriate stiffness or damping.

Springs (
Bushing Joint (
Joint Types (

The video too might serve helpful in understanding different Kinematic constraints and how to define them in Ansys Mechanical-
Creating Kinematic Constraints Between Parts - Lesson 5 - ANSYS Innovation Courses

Hope this helps!