Rotor Structural Loads Analysis Using Coupled Computational Fluid Dynamics/Computational Structural Dynamics

Comparison of Rotor Structural Loads Calculated Using Comprehensive Analysis

Blade flap and chord bending and torsion moments are investigated for six rotors operating at transition and high speed: H-34 in flight and wind tunnel, SA 330 (research Puma), SA 349/2, UH-60A full-scale, and BO­ 105 model (HART-I). The measured data from flight and wind tunnel tests are compared with calculations obtained using the comprehensive analysis CAMRAD II. The calculations were made ...

Computational-Fluid-Dynamics- and Computational-Structural-Dynamics-Based Time-Accurate Aeroelasticity of Helicopter Rotor Blades

A modular capability to compute dynamic aeroelastic characteristics of rotor blades using the Euler/Navier– Stokes flow equations and finite element structural equations is presented. The approach is based on a time-accurate analysis procedure that is suitable for nonlinear fluid–structure interaction problems. Fluids and structural solvers are time-accurately coupled in the C++ environment. Un...

Structural Loads

Continuously Heated Greenhouses: A production or retail greenhouse with a constantly maintained temperature of 50 degrees F or more during winter months. Such greenhouse must also have a maintenance attendant on duty at all times or an adequate temperature alarm system to provide warning in the event of a heating system failure. In addition, the greenhouse roof material must have a thermal resi...

Computational Fluid Dynamics/Computational Structural Dynamics Interaction Methodology for Aircraft Wings

With advanced subsonic transports and military aircraft operating in the transonic regime, it is becoming important to determine the effects of the coupling between aerodynamic loads and elastic forces. Because aeroelastic effects can signiŽ cantly impact the design of these aircraft, there is a strong need in the aerospace industry to predict these interactions computationally.Such an analysis...

Computational Structural Dynamics of Proteins