Analysis, design and elastic tailoring of composite rotor blades

final report
  • 1.37 MB
  • English

Center for Rotary Wing Aircraft Technology, Georgia Institute of Technology , Atlanta, Ga
Rotors., Rotors (Helicop
StatementLawrence W. Rehfield and Ali R. Atilgan.
SeriesNASA-CR -- 181234., NASA contractor report -- NASA CR-181234.
ContributionsAtilgan, Ali R., United States. National Aeronautics and Space Administration.
The Physical Object
Pagination1 v.
ID Numbers
Open LibraryOL15280894M

The development of structural models for composite rotor blades is summarized. The models are intended for use in design analysis for the purpose of exploring the potential of elastic tailoring.

composite rotor blades. The models are intended for use in design analysis for the purpose of exploring the potential of elastic tailoring.

The research has been performed at the Center for Rotary Wing Aircraft Technology, Georgia Institute of Technology. Professor Lawrence W.

Rehfield was the Principal Investigator. Get this from a library. Analysis, design and elastic tailoring of composite rotor blades: final report. [L W Rehfield; Ali R Atilgan; United States.

National Aeronautics and. Analysis, design and elastic tailoring of composite rotor blades. By Lawrence Wilmer Rehfield. Abstract. Issued as Semiannual status report and Final report, Project no.

E Topics: Rotors, Rotors (Helicopters) Publisher: Georgia Author: Lawrence Wilmer Rehfield. Abstract. The purpose of this chapter is to provide an insight into the behavior of composite rotor blades, their modeling and the associated analysis methodologies.

From a structural point of view, blades are usually treated as slender structures. This category includes all structures where one of their dimensions is much larger than the by: 8.

composite blades. For this reason, elastic tailoring of composite rotor blades through the specialized design of composite laminates has been a popular research topic in recent years.

Details Analysis, design and elastic tailoring of composite rotor blades EPUB

Kinematic couplings have been used as a basic design tool to improve the aeroelastic and aero-mechanical stability of conventional metal and com-posite rotor blades. However, elastic tailoring of com-posite blades File Size: 2MB. In this chapter, four main topics in composite blades of wind turbines including design, stress analysis, aeroelasticity, and fatigue are studied.

For static analysis, finite element method (FEM) is applied and the critical zone is by: 1. Corpus ID: AEROELASTIC ANALYSIS FOR HELICOPTER ROTOR BLADES IN HOVER AND FORWARD FLIGHT @inproceedings{LeeAEROELASTICAF, title={AEROELASTIC ANALYSIS FOR HELICOPTER ROTOR BLADES IN HOVER AND FORWARD FLIGHT}, author={In Heon Lee and Min-Soo Jeong and Seung-Jae Yoo} }.

many structures. The aeroelastic tailoring blade (ATB) adopts the basic concept of aeroelasticity in a blade struc-ture. It has been introduced and studied in aircraft tech-nology (Cornette et al., ).

ATB is a new approach in WT systems where the blades are built up with composite materials in contrast to conventional rigid blades. The use. elastic tailoring properties and potential for creating The first commercial composite rotor-blade yoke assembly made from glass-fibre/epoxy and Chan [45] for analysis and design of complex shape composite components, adequately models tapered and layered plates.

The finite-element modelling, however. Structural Model (ASM) has been developed to capture the elastic response of a generic composite aerofoil under aerodynamic and inertial forces. The intent is to generate a structural modelling and rapid sizing capability for aircraft wings, fan and propeller blades and wind turbine blades to achieve optimal utilisation of the composite material.

Cross-Sectional Design of Composite Rotor Blades a sensitivity analysis is conducted by which design thicknesses to implement elastic tailoring. However, introducing a.

Description Analysis, design and elastic tailoring of composite rotor blades EPUB

Design Analysis Methodology for Composite Rotor Blades. Presented at the 7th DoD/NASA Conference on Fibrous Composites in Structural Design. AFWAL-TR, Denver, Colorado, Junepp. (V(a)-1)-(V(a)).

Download Analysis, design and elastic tailoring of composite rotor blades PDF

Vibration Suppression of a Helicopter by Pendulum Absorbers: First Elastic Mode of Blades(Dynamics & Design Conference ) Transactions of the Japan Society of Mechanical Engineers Series C, Vol.

76, No. Cited by: Design and Analysis of Glass Fiber Reinforced Plastic Composite Rotor Blade 1 N. Sambasiva Rao2 1M.

Tech. Student 2Associate Professor Abstract—GFRP (Glass Fiber Reinforced Plastic) composite materials are used in many engineering applications because of its high strength to weight ratio. The purpose of this. Linear static and dynamic analysis for hinged rotor blades of 60m span for a two bladed horizontal axis wind energy converter.

Stuttgart: Institut für Statik und Dynamik der Luft-und Raumfahrtkonstruktionen, Universität Stuttgart. MLA Citation. Argyris, J. and Braun, K.

and Kirchgässner, B. and Universität Stuttgart. A moderate deflection composite helicopter rotor blade model with an improved cross-sectional analysis International Journal of Solids and Structures, Vol.

46, No. 10 Buckling analysis of thin-walled open members—A Cited by: The purpose of the present analysis is to provide an analysis tool for the preliminary design of ATP blades and to examine the effectiveness of aeroelastic tailoring.

A subsonic unsteady cascade theory developed by Smith [8] is combined with the nonlinear structural dynamic model for composite pretwisted propeller blades developed by Kosmatka Cited by: 5. Aeroelastic instability analysis of composite rotating blades based on composite blade model.

For the purpose of the study, the composite wind turbine blade is modeled as an elastic cantilevered rotating thin-walled composite box beam with the coupling in the composite rotor blade, as shown in Fig. CAS ply-angle configuration,File Size: 1MB.

SUMMARY: In this paper the design, fabrication and analysis of behavior by full-scale ver-ification testing for the tail rotor blade of composite laminated materials for a heavy transport helicopter is given.

The verification test program for the tail rotor blade encompassed static and dynamic Size: KB. Of those, the ones used most frequently are L or angle, C or channel, Z, T or blade, I, J and Hat or omega.

For a composite beam, each member may have a different layup. This would result in different stiffnesses and strengths for each of the flanges and web and would allow more efficient usage of composite materials through tailoring.

design in desirable elastic twist in response to rotor loads, either centrifugal or flap, that enhance energy capture performance. The reorientation of the fiber directions in the blade skin or spar to achieve either flap-load or extension-load coupling with blade twist, has potential to be a cost effective and reliable aeroelastic tailoring by:   Co-Blade is an open source software that can be used for the structural analysis and design of composite blades for wind and hydrokinetic turbines.

The objective of Co-Blade is to help designers accelerate the preliminary design phase by providing the capabilities to quickly analyze alternative composite layups and to study their effects on Reviews: 9.

Rotor Blade Governing Equation System Shear Deformable Theory Composite Rotor Blade Tilt Rotor Aircraft These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

In order to investigate the effect of blade elastic couplings on vibratory hub loads, the model rotor design will focus on blade dynamic design, for the blade natural frequency placement and rotor aeroelastic properties were determined by the blade dynamic design.

The key issue of the dynamic design of the composite tailored blades is to. The structural design for a recently presented aeroelastically-tailored wind turbine blade is produced. Variable elastic twist has been shown to improve performance in response to load variation across different wind conditions.

This load variation is exploited as a source of passive structural by: The literature concerning the analysis and design of flexible composite marine propellers is, however, scarce. The development of a nonlinear hydro-elastic model has been described [3] and the application of evolutionary algorithms in the design of the laminate stacking sequence in order to reduce torque loads has been presented [4].Cited by: Deterministic design and analysis of composite structures use the nominal material properties of com-posites.

However, effective material properties of composites are istics of composite rotor blades. Therefore, the variations associ- energy of the elastic blade.

This includes composite helicopter and wind turbine rotor blades, as well as other slender composite parts, such as landing gear, propellers and high-aspect ratio wings.” “EJ-Projects uses VABS together with GEBT, an open source companion code to VABS, in design analysis focused on rotor blade dynamics,” added Eric Jansen of EJ-Projects.

The cross-sectional analysis of KARI small-scaled blade is performed using KSec2D. Figure 6 shows is meshed with 2, 3-node triangular elements. The results are compared with those calculated using CORDAS software (KARI) developed by Russia-Korea Aerospace Research center for composite rotor blade cross-section analysis, shown in Table Size: KB.

Rotor Blade RESULTS Figure 4: Total Deflection Of Helicopter Rotor Blade Figure 5: Von Mises Stress Of Helicopter Rotor Blade V. DYNAMIC ANALYSIS OF HELICOPTER ROTOR BLADE Modal ANALYSIS: Modal Investigation Might Have Been Conveyed Out To Focus The Common Frequencies Furthermore Mode Shapes Of A Structure In The Recurrence Go For 0 - : S Mohan Kumar, J Narsaiah, Pininti Sairam Reddy.In these days, large-scale wind turbines are being made of the Glass Fiber Reinforced Plastic (hereinafter F.R.P).

Some reinforcement stiffeners such as carbon fiber and polyamide (Kevlar) are not economical for the wind turbine. In addition, the steel or aluminum alloy, featuring heavy weight and metallic fatigue load, is not suitable for global use, except very small-scale wind Author: C.Y.

Son, H.I. Byun, K.H. Kim, J.K. Choi, J.Y. Shin.compute the design thickness of load-bearing composite laminates. The code also includes an analysis option to obtain blade properties if a composite laminates schedule is prescribed.

These properties include bending stiffness, torsion stiffness, mass, moments of inertia, elastic-axis offset, and center-of-mass offset along the blade.