Abstract: Nonlinear dynamic behavior of a dipole Bose-Einstein condensate (BEC) trapped by harmonic potentials is numerically studied. We introduce a circular moving repulsive Gaussian potential to stir the condensate and study its emission phenomenon. The study is based on dimensionless two-dimensional GP equation. It reveals that there are three emission modes, namely vortex dipole emission, cluster emission and oblique soliton emission, in the wake. With a systematic numerical calculation, parameter regimes of dipole interactions corresponding to various excitation modes are obtained. Influences of dipole interactions and Gaussian potential conditions on excitation modes are analyzed, and physical mechanism of different emission modes is discussed.