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A planning algorithm for the near space maneuvering trajectory of the HTV (Hypersonic Technology Vehicle) is developed. Firstly, the coordinate system for trajectory planning and the motion equations of the vehicle are established. Then, the models of the constraint conditions considering fly-way points and no-fly zones are deduced. Further, the corresponding flight corridor and the trajectory planning algorithm are developed. Simulation results indicate that the lateral envelope of the near space maneuvering trajectory is above 3000km and the low-flight model makes the detection ability of radar largely deduced. In the multiple confrontation case with four TPY-2 radars, the planned near space lateral maneuvering trajectory can avoid all of the no-fly zones effectively and finally fly through the target point.

In the development of large and complex equipment, a large-scale finite element analysis (FEA) with high efficiency is often strongly required. This paper provides some progress on parallel solution of large-scale modal and vibration FE problems. Some predominant algorithms for modal and vibration analysis are firstly reviewed and studied. Based on the newly developed JAUMIN framework, the corresponding procedures are developed and integrated to form a parallel modal and vibration solution system; the details of parallel implementation are given. Numerical experiments are carried out to evaluate the parallel scalability of our procedures, and the results show that the maximum solution scale attains ninety million degrees of freedom (DOFs) and the maximum parallel CPU processors attain 8192 with favorable computing efficiency.