Actuated variable geometry mid turbine frame design

摘要

A mid-turbine frame assembly (16) includes a mid-turbine frame (44), a ring structure (42) and a plurality of actuated struts (52a,52b). The ring structure surrounds the mid-turbine frame, and has an interior surface (56) and an exterior surface (58). The actuated struts connect the ring structure to the mid-turbine frame. The actuated struts are strain actuated so that the actuated struts reposition the ring structure in response to a strain.