A Natural Frequency and Mode Shape Allocation Method Based on Mixed Addition of Mass and Stiffness
A technology of natural frequency and configuration method, applied to one-order or multi-order natural frequency and mode shape, based on the frequency response function model of the original structure to add mass and stiffness configuration to the original structure, which can solve the problems of difficult configuration effects and achieve The effect of avoiding blindness, reducing design cost and improving design efficiency
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[0043] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit this invention.
[0044] The present invention provides a method based on the mass and stiffness of the original structure frequency response function model to add and configure the natural frequency and mode shape. It is assumed that the vibration differential equation of the general linear n-degree-of-freedom undamped vibration vibration system is expressed as:
[0045]
[0046] In the formula, K and M are the stiffness matrix and mass matrix of the original structure, respectively, and x represents the displacement vector; Indicates the acceleration vector;
[0047] Le...
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