Reconstruction of Ares I-X Integrated Vehicle Rollout Loads

The measurements taken during the Ares I-X test fli ght provided a unique opportunity to assess the accuracy of the models and methods used to analyze the loads and accelerations present in the planned Ares I vehicle. During the r ollout of the integrated vehicle from the Vehicle Assembly Building (VAB) to the launch pad, the vehicle and its supporting structure are subjected to wind loads and the vibrations prod uced by the crawler-transporter (CT) that is carrying it. While the loads induced on the vehicle during this period are generally low relative to those experienced in flight, the ro llout is a period of critical interest to those designing both the ground support equipment and the interfaces between the launch vehicle and its supporting structure. In this paper, the me thods used for reconstructing the loads during the rollout phase are described. The results generated are compared to measured values, and an assessment is made into the strength s, weaknesses, and accuracy of the Ares I rollout simulation techniques.