Structural modal sensitivity analysis method based on novel actual measurement standardization technology
A technique of sensitivity analysis and structural mode, applied in design optimization/simulation, special data processing applications, instruments, etc.
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[0041] This embodiment provides a structural modal sensitivity analysis method based on a novel measured normalization technology, which includes the following steps:
[0042] S1, obtain the mass and stiffness matrix of the structural system, calculate the natural frequency and the initial output real mode of the structural system;
[0043] S2, adjust the initial output real mode to make it meet the normalization condition, and obtain the normalized real mode;
[0044] S3, select a certain design parameter L, and calculate the sensitivity of the property matrix of the structural system;
[0045] S4, calculating the first-order sensitivity and second-order sensitivity of the normalized real mode, respectively.
[0046] In step S1, specifically include:
[0047] S11, obtain the mass M and stiffness matrix K of the structural system, and calculate D=-M -1 K;
[0048] S12, using MATLAB software to calculate the eigenvalue λ of the real mode D i , and the corresponding initial...
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