According to the actual installation state of a pipeline of a rocket, a rocket transmission pipe test system under combined environment loads was designed and constructed. This system contained a vibration control system, a low temperature liquid loading one, a pressure loading balance one, a pipeline limited displacement compensating one and a pipeline deformation instability protection one. Using the test system, natural frequencies of a pipeline structure under conditions of normal temperature and normal pressure, charging and liquid nitrogen charging were analyzed, respectively. Based on the test results, the finite element model of the pipeline was established and modified. Numerical simulation and tests for dynamic responses of the pipeline under comprehensive environment stresses of a rocket were conducted. The results were analyzed. They provided a strong guide for the design of different types of space pipelines.
Key words
rocket transmission pipe /
composite stress test system /
finite element model;
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