After having solved the aging problems of beams, the long term aging effect of a solid propellent grain is also analyzed as an example.
在对梁的受拉伸与自重情形下的老化作了分析后，举例分析了真实固体火箭发动机药柱的长期老化效应。
After having solved the aging problems of beams, the long term aging effect of a solid propellent grain is also analyzed as an example.
在对梁的受拉伸与自重情形下的老化作了分析后，举例分析了真实固体火箭发动机药柱的长期老化效应。
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