Variable decoupling membrane rigidity mixed mode magnetorheological vibration isolator

The invention discloses a variable decoupling membrane rigidity mixed mode magnetorheological vibration isolator. The variable decoupling membrane rigidity mixed mode magnetorheological vibration isolator comprises magnetorheological liquid, a shell, a rubber main spring, a connecting rod, a rubber bottom membrane, a magnetic core assembly; the magnetic core assembly comprises a magnet exciting coil, an outer magnetic core, an inner magnetic core, a base and a decoupling membrane; the inner magnetic core is shaped like a big-end-up cone frustum; the outer magnetic core is provided with a conical through hole matched with the inner magnetic core; the outer magnetic core and the inner magnetic core are matched with each other to form a conical damping channel used for enabling an upper cavity and a lower cavity to communicate with each other; the base is provided with a groove used for containing a decoupling membrane; and a throttling hole is formed in the bottom of the groove. The variable decoupling membrane