Progresses on virtual dynamic test techniques for space vehicles

With the increasing complexity for the modern space vehicles,both analytical methods and ground dynamic tests are not satisfying the design requirements for actual space vehicles.In order to face this challenge and solve the problem,in the present paper,the research focuses on the virtual dynamic test techniques for space vehicles are summarized as follows:(1)For the virtual modal test techniques consisting of sub-structural synthesis techniques based on the experimental modelling method,in order to illustrate this novel method,two case studies were presented.The first one was the virtual modal test for CZ-2E launch vehicle,for which the modal parameters of the large strap-on launch vehicle(LM-2E) have been predicted successfully by the proposed the virtual modal test techniques.The predicted modes are very consistent with the ones obtained from the practical launch vehicle modal test thereafter,which consequently credits the reliability of the proposed techniques.The second example was the virtual modal test for CZ-2F launch vehicle,which resulted in reliable mathematics model and data for dynamic analysis of launch vehicle-spaceship coupling.(2)For the virtual vibration tests technique of a shaker is discussed,in order to illustrate this novel method,the virtual vibration test of a shaker for the satellite is presented.