30-05-2023 дата публикации
Номер: CN116186830A
Принадлежит:
A modeling method of a central rigid body-variable cross-section beam system comprises the following steps: step 1, determining geometric parameters of a central rigid body, geometric parameters of a variable cross-section beam and material parameters, establishing the central rigid body-variable cross-section beam system, and turning to step 2; step 2, obtaining transverse and longitudinal vibration modal shapes of the variable cross-section beam model based on a cantilever beam model and a finite element method, and turning to step 3; step 3, using a Hamilton principle to deduce a kinetic equation of the rotating flexible beam system, then using a hypothetical mode method to carry out discretization, selecting and intercepting the mode obtained in the step 2 by using the hypothetical mode, obtaining a high-precision and low-degree-of-freedom model of the system, and turning to step 4; 4, initial conditions are given, and the large-range motion angle and the tail end transverse displacement ...
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