Résumé : We analyze the dynamical response of an isothermal liquid bridge to a step change in the mass force magnitude by numerically solving the three-dimensional Navier-Stokes equations. We study the free surface oscillations caused by both axial and lateral pulses of the mass force. The oscillation amplitude and the dynamical stability limit are calculated for different values of the parameters characterizing the fluid configuration. We examine the stability of one of the liquid bridges to be analyzed in the Japanese and European Research Experiment on Marangoni Instabilities experiment on board of the International Space Station (ISS). We study the response of that liquid bridge to real g-jitter on board of the ISS.