  Fully self-consistent hybrid MHD/particle simulations reveal strong energetic
particle modifications to sub-cyclotron global Alfv\'{e}n eigenmodes (GAE) in
low-aspect ratio, NSTX-like conditions. Key parameters defining the fast ion
distribution function -- the normalized injection velocity $v_0/v_A$ and
central pitch -- are varied in order to study their influence on the
characteristics of the excited modes. It is found that the frequency of the
most unstable mode changes significantly and continuously with beam parameters,
in accordance with the Doppler-shifted cyclotron resonances which drive the
modes, and depending most substantially on $v_0/v_A$. This unexpected result is
present for both counter-propagating GAEs, which are routinely excited in NSTX,
and high frequency co-GAEs, which have not been previously studied. Large
changes in frequency without clear corresponding changes in mode structure
could indicate the existence of a new energetic particle mode, referred to here
as an energetic-particle-modified GAE (EP-GAE). Additional simulations
conducted for a fixed MHD equilibrium demonstrate that the GAE frequency shift
cannot be explained by the equilibrium changes due to energetic particle
effects.
