采用有限元软件ANSYS参数设计语言（APDL）实现复合材料薄壁圆柱壳结构在线性分布温度场作用下的非线性热振动特性分析。
The nonlinear thermal vibration characteristic of the composite thin-cylindrical shells under linear temperature field is investigated by the ANSYS parametric design language(APDL).
磁控管的温度分布是二阶非线性偏微分方程。
The governing equation of the temperature field of pulse - magnetron is a nonlinear second order partial differential equation .
季节冻土层中的地温呈非线性分布，改变了冻土墙形成时的初始温度条件以及形成后的结构形式。
The existence of the seasonal frozen soil layer provides a favorable environment for the formation of the artificially frozen wall; also it changes the wall's configuration.
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