Parametric studies are performed on two generic square solar sail designs to identify parameters of interest. The studies are performed on systems-level models of full-scale solar sails, and include geometric nonlinearity and inertia relief, and use a Newton-Raphson scheme to apply sail pre-tensioning and solar pressure. Computational strategies and difficulties encountered during the analyses are also addressed. The purpose of this paper is not to compare the benefits of one sail design over the other. Instead, the results of the parametric studies may be used to identify general response trends, and areas of potential nonlinear structural interactions for future studies. The effects of sail size, sail membrane pre-stress, sail membrane thickness, and boom stiffness on the sail membrane and boom deformations, boom loads, and vibration frequencies are studied. Over the range of parameters studied, the maximum sail deflection and boom deformations are a nonlinear function of the sail properties. In general, the vibration frequencies and modes are closely spaced. For some vibration mode shapes, local deformation patterns that dominate the response are identified. These localized patterns are attributed to the presence of negative stresses in the sail membrane that are artifacts of the assumption of ignoring the effects of wrinkling in the modeling process, and are not believed to be physically meaningful. Over the range of parameters studied, several regions of potential nonlinear modal interaction are identified.
[1]
David W. Sleight,et al.
Toward Effective Shell Modeling of Wrinkled Thin-Film Membranes Exhibiting Stress Concentrations
,
2004
.
[2]
Aaron Lee Adler,et al.
Finite element approaches for static and dynamic analysis of partially wrinkled membrane structures
,
2000
.
[3]
David Murphy,et al.
Scalable Solar Sail Subsystem Design Considerations
,
2002
.
[4]
John Wang,et al.
Assessment of Analysis Approaches for Solar Sail Structural Response
,
2003
.
[5]
J. L. West,et al.
Solar sail vehicle system design for the Geostorm Warning Mission
,
2000
.
[6]
M. M. Mikulas,et al.
DESIGN STUDY OF A SQUARE SOLAR SAIL ARCHITECTURE
,
2001
.
[7]
Colin R. McInnes,et al.
Solar Sailing: Technology, Dynamics and Mission Applications
,
1999
.
[8]
Willi W. Schur,et al.
Fine Scale Analysis of Wrinkled Membranes
,
2000,
Int. J. Comput. Eng. Sci..
[9]
Christopher H. M. Jenkins,et al.
Gossamer spacecraft : membrane and inflatable structures technology for space applications
,
2001
.
[10]
Eugenio Brusa,et al.
Second approximation structural assessment of the Aurora solar sail spacecraft
,
1997
.
[11]
Alexander Tessler,et al.
Nonlinear Shell Modeling of Thin Membranes with Emphasis on Structural Wrinkling
,
2003
.