Towards Modeling of Cable-Harnessed Structures: Cable Damping Experiments

Kaitlin, S; Agnes, Gregory S.; Inman, Daniel J.

doi:10.2514/6.2013-1889

Cited by 15 publications

(7 citation statements)

References 6 publications

(5 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…First, an examination of a variety of cables was conducted to determine how to measure the dynamic response of the cable itself and what type of cable would represent a typical spaceflight cable and produce repeatable frequency response functions to ensure a valid and meaningful comparison between the treated and untreated cables. Preliminary experiments were run on these spaceflight cables to determine what factors and parameters would need to be controlled [15]. A standard run was developed to acquire clear frequency response functions that identified the first and second modes, and these methods were used on a new set of cables manufactured more consistently.…”

Section: A Initial Investigation and Methods Developmentmentioning

confidence: 99%

“…Cable tension and cable tie tightness were important factors to keep constant for each test section, while excitation method and excitation string length and tension did not affect the results. Further details of the standard run development are available in [15]. It was also important to keep the static displacement of the cable to a minimum as a precaution, as curvature in the cable would cause wires to slip and thus change the bending stiffness based on the equations of [10].…”

Section: A Initial Investigation and Methods Developmentmentioning

confidence: 99%

See 1 more Smart Citation

Bakeout Effects on Dynamic Response of Spaceflight Cables

Kaitlin

Agnes

Inman

2014

Journal of Spacecraft and Rockets

Self Cite

View full text Add to dashboard Cite

Section: A Initial Investigation and Methods Developmentmentioning

confidence: 99%

Section: A Initial Investigation and Methods Developmentmentioning

confidence: 99%

Bakeout Effects on Dynamic Response of Spaceflight Cables

Kaitlin

Agnes

Inman

2014

Journal of Spacecraft and Rockets

Self Cite

View full text Add to dashboard Cite

“…The range of experimental frequencies for each mode was recorded, as well as the average natural frequency for the first four modes; these details can be found in Table 5 in the Appendix. Experimental testing is discussed in further detail in [13]. …”

Section: Experimental Testingmentioning

confidence: 99%

“…Matrices M and N represent the boundary conditions; in this case, for the free end conditions, the boundary condition matrices are (12) The fundamental matrix with connection points included is given as (13) and for this specific cable model with five cable sections and four springs, the matrix used to determine the natural frequencies is (14) The roots are of the form , where is the kth natural frequency of the system. Solutions were obtained numerically; values of s were substituted into the characteristic equation and the determinant was evaluated.…”

Section: A Undamped Cable Modelmentioning

confidence: 99%

Inclusion of Shear Effects, Tension, and Damping in a DTF Beam Model for Cable Modeling

Kaitlin

Agnes

Inman

2014

55th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

Self Cite

View full text Add to dashboard Cite

The distributed transfer function method is applied to equations of motion for a space flight cable in an ongoing effort to characterize the effects of adding cabling to space structures. A cable model is presented in which the cable is modeled as a shear beam with multiple boundary constraints. Tension in the cable is included and a variety of damping mechanisms are incorporated. Comparison of the model results to experimental data is included, showing that the distributed transfer function cable model with equivalent cable property inputs can bound the range of cable responses and that hysteretic and connection stiffness damping improve the comparison between the model and experimental data. NomenclatureA = area of cable cross-section c v = damping coefficient for motion-based viscous damping c s = transverse damping coefficient for spring connection = rotational damping coefficient for spring connection E = composite elastic modulus of the cable EI = bending stiffness of the cable F(s) = transfer function matrix G = shear modulus G(s) = Laplace transform of the GHM damping expression as a function of s I = area moment of inertia k = connection spring stiffness = connection spring rotational stiffness l i = cable section length M = left side boundary condition matrix N = right side boundary condition matrix q = applied external force s = Laplace transform variable T = axial tension of the cable T m = transition matrix w = cable displacement W(x,s) = Laplace transform of the lateral cable displacement = GHM damping parameter, numerator = shear angle 2 = GHM damping parameter, denominator = GHM damping parameter, numerator = GHM damping parameter, denominator η(x,s) = solution vector for the distributed transfer function method = shear factor ρ = cable density = total rotation angle ψ = Laplace transform of the cable rotation

show abstract

“…al. [8,9] developed the distributed transfer function method to model cables and simple cabled structures. They included shear effects, tension, and hysteretic damping for modeling of helical stranded cables and investigated the effect of cables on the dynamics of cabled structures using the developed model and by experimental tests.…”

Section: Introductionmentioning

confidence: 99%

Development And Validation Of A Numerical Model For Vibration Of Power Lines

Jalali¹,

Rideout²

2018

Progress in Canadian Mechanical Engineering

View full text Add to dashboard Cite

Modal testing is being investigated as a means of non-destructive evaluation of wooden utility pole strength. In order to understand the effects of conductors on the dynamics of the poles, a numerically efficient model based on lumped segments for the conductor has been developed and experimentally validated. The cable is modeled as number of lumped segments jointed with axial and torsional springs and dampers representing the cable's compliance and damping. In order to validate the models, an experimental set up for vibration testing of the cable has been built. Time response measurement and modal testing are performed and the comparison of the experimental results with the numerical results show that the lumped segment model has the fidelity to capture the dynamics of the cables efficiently and accurately.

show abstract

Towards Modeling of Cable-Harnessed Structures: Cable Damping Experiments

Cited by 15 publications

References 6 publications

Bakeout Effects on Dynamic Response of Spaceflight Cables

Bakeout Effects on Dynamic Response of Spaceflight Cables

Inclusion of Shear Effects, Tension, and Damping in a DTF Beam Model for Cable Modeling

Development And Validation Of A Numerical Model For Vibration Of Power Lines

Contact Info

Product

Resources

About