Structures, Structural Dynamics & Material

The desire to create ever-lighter aircraft combined with the need to meet federal regulations on emissions and noise creates high-tech challenges for aircraft designers. The aerospace and defense industry has pioneered new materials and structures that can minimize weight, improve performance, and reduce fuel consumption, noise and emissions.

Various parts of the aircraft present specific design challenges. The airframe is subject to aero-elastic vibrations beyond the flutter envelope. Brakes must be engineered to avoid squeal. Landing gear must be sturdy enough to accept loads produced as a result of landing yet light enough to retract efficiently.  To address all these challenges, aerospace engineers apply ANSYS Mechanical software. It features automated contact analysis to quickly set up and perform modal analyses of the brakes and predict unstable modes that produce squeal. In addition, its flexible multibody dynamics can efficiently predict stresses in the gear and dynamic response as the vehicle hits the runway.

Deformations in engine nacelles due to a burst compartment high-pressure line can cause interference with neighboring structures. These deformations can be predicted with ANSYS Multiphysics, which couples detailed ANSYS CFD simulations with ANSYS FEA models.

ANSYS software is used to predict aero-elastic deformations in wings of unmanned aerial vehicles, which must be designed to sustain aerodynamic loads and avoid flutter. ANSYS CFX and ANSYS Mechanical technologies are coupled out of the box for superior technical integration, validation and ease of use.

Virtual testing is the first step in thoroughly validating and carefully integrating any new material or technology. ANSYS Mechanical provides the depth of capabilities to accurately simulate the behavior of structures; at the same time, it offers a highly integrated workflow that provides computational fluid dynamics software to minimize noise from the airframe and landing gear, as well as multiphysics software to optimize smart materials and adaptive structures with piezoelectric actuators and shape memory alloys.

Whether exploiting new materials, or dealing with the regulatory issues of emissions and noise, ANSYS software can help aircraft designers create virtual models that become the first step in testing new technologies, shaping the design of future aircraft.