FEM Dynamic Analysis Of Hard X-ray Modulation Telescope (HXMT)

The energy band of hard X-ray, with strong penetrability, is an important astrophysical wave band. People can get much information of radiant points from the research about it, for example, the size of the radiant points, the mechanism of radiate and space distribution. By observing the energy band of hard X-ray, people not only can expand a series of studies to celestial bodies or phenomena of nova and supernova's breaking out, nucleus's compose, but also many interactional process of thermal braking radiation, synchronal radiation. Accordingly, hard X-ray Modulation Telescope (HXMT) is a significant implement that will accelerate human's knowledge about the thermal radiation process of high-energy celestial bodies. HXMT can achieve the following science missions: (1) Observing the hard X-ray in the whole space and plotting its distributional map. (2) Image observing the interested space deeply. (3) Continuously and sensitively observing the special celestial bodies, and gained the energy spectrum and changes with time of the celestial bodies' radiation. (4) Observing the galactic plane periodically.When trying to design the HXMT, it has to be answered that whether the HXMT and its workgroups can endure the mechanics conditions at launching state or not. Then the interest of this paper is that simulating the mechanics conditions and analyzing the design model by computers in order to demonstrate the feasibility of the design project. In this paper, the HXMT and its main components, collimator parts, are simulated on the mechanics conditions at launching state, by using FEM software, ANSYS and I-DEAS. When simulating the collimator parts, a refined mesh is introduced, in order to characterize the displacement and stress distribution of every subassembly. When simulating the HXMT, the substructure modeling method and static condensation method (Guyan reduction method) are adopted to this great complex structure because of the particularity of the structure's construct. In this way, the simulation results of HXMT become more reliable.The simulation analysis results of collimator parts indicate that, the collimator parts meet design standard in sine excitation state, but not in impact excitation state orrandom excitation state. Basing the simulation analysis results of HXMT, the following conclusions can be got: the design standard can be met in sine excitation state in bolt fix install method.Finally, some suggests can be provided: the design project of collimator parts needs to be improved; the design project of HXMT can meet the design standard.