Torsional Deformation in Wings — Lesson 2

This lesson covers the concept of torsional deformation in wings, focusing on the torsional deformation equation of a straight wing. It explains how every section of the wing is treated as a 2D aerofoil and how the aerodynamic movement is applied. The lesson also discusses the conditions under which the deformation of the wing becomes very large. It further explores the concept of uniform and non-uniform wings and how to solve for the type of equation using approximate methods. The lesson concludes with a discussion on the Rayleigh Ritz and Galerkin approaches for solving the torsional deformation problem.

Video Highlights

01:46 - Discussion on the initial rigid angle of attack and its function along the span.
06:15 - Explanation of the condition for the divergence speed and how to find it.
09:24 - Discussion on the divergence speed for a uniform wing and how to calculate it.
31:38 - Discussion on the divergence speed for a non-uniform wing and how to calculate it using the Rayleigh Ritz approach.
58:59 - Explanation of the Galerkin approach for calculating the divergence speed for a non-uniform wing.

Key Takeaways

- The torsional deformation equation of a straight wing is crucial in understanding the behavior of the wing under different conditions.
- The deformation of the wing becomes very large under certain conditions, which can be determined using the torsional deformation equation.
- The concept of uniform and non-uniform wings plays a significant role in solving the torsional deformation equation.
- The Rayleigh Ritz and Galerkin approaches are two methods used to solve the torsional deformation problem. Both methods have their advantages and disadvantages, and the choice of method depends on the specific problem at hand.