Robuta

https://vtechworks.lib.vt.edu/items/a35948a8-ecc5-4ed7-ad59-2307a470f6c2 Natural frequencies and an atlas of mode shapes for generally-laminated, thick, skew, trapezoidal... Composite materials are increasingly finding use in structures, such as aircraft components, and thus, an accurate method of predicting response is required.... natural frequencies shapes for atlas mode generally https://journalofscience.ou.edu.vn/index.php/tech-en/article/view/404/334 View of Natural frequencies and critical loads of functionally graded single span beams resting on... natural frequencies critical loads resting on view functionally