Cable construction effects on the lateral forces and wakes of helically stranded cables under oblique inflow
Abstract
Helically stranded cables in aerial towing systems experience oblique inflow, but are often modeled as smooth cylinders, neglecting three-dimensional cross-stream coupling and surface texture. We perform large-eddy simulations and spectral proper orthogonal decomposition for a smooth cylinder and four stranded cables at four inclinations from 22.5∘ to 90∘, all stationary, with Re ≈ 1.0 × 104. Aerodynamic differences are governed mainly by cross-sectional symmetry and strand-scale groove depth. Force-source decomposition shows that surface pressure contributes 94.9%--98.3% of the mean normal force and dominates the mean lateral force. High-symmetry, quasi-circular envelopes maintain balanced circumferential pressure, whereas deep-grooved, low-symmetry tri-lobed geometries produce asymmetric separation and a persistent lateral pressure imbalance. In the wake, high-symmetry cables sustain spanwise-synchronized Karman shedding at moderate-to-high inclinations, concentrating fluctuation energy in a dominant low-rank mode. Deep grooves disrupt shedding coherence, deflect the recirculation zone laterally, and spread energy across broadband scales. Mean lateral force and lateral-force fluctuations are therefore decoupled: the quasi-circular (1 × 19) cable has minimal mean lateral force but strong periodic fluctuations, while the deep-grooved (3 × 7) cable has weak fluctuations but appreciable mean lateral force. These results support construction-dependent cable selection and aerodynamic load modeling.
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BibTeX
@misc{ma2026cable,
title = {{Cable construction effects on the lateral forces and wakes of helically stranded cables under oblique inflow}},
author = {Tielin Ma and Junlin Zhang and Jingcheng Fu and Chongwen Jiang and Chuan Ye},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.11286},
eprint = {2611.11286},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.11286},
note = {CC0},
}
RIS
TY - UNPB
TI - Cable construction effects on the lateral forces and wakes of helically stranded cables under oblique inflow
AU - Tielin Ma
AU - Junlin Zhang
AU - Jingcheng Fu
AU - Chongwen Jiang
AU - Chuan Ye
PY - 2026
DA - 2026/11/08
PB - arXiv
DO - 10.48550/arxiv.2611.11286
UR - https://arxiv.org/abs/2611.11286
AB - Helically stranded cables in aerial towing systems experience oblique inflow, but are often modeled as smooth cylinders, neglecting three-dimensional cross-stream coupling and surface texture. We perform large-eddy simulations and spectral proper orthogonal decomposition for a smooth cylinder and four stranded cables at four inclinations from 22.5^∘ to 90^∘, all stationary, with Re ≈ 1.0 × 10^4. Aerodynamic differences are governed mainly by cross-sectional symmetry and strand-scale groove depth. Force-source decomposition shows that surface pressure contributes 94.9%--98.3% of the mean normal force and dominates the mean lateral force. High-symmetry, quasi-circular envelopes maintain balanced circumferential pressure, whereas deep-grooved, low-symmetry tri-lobed geometries produce asymmetric separation and a persistent lateral pressure imbalance. In the wake, high-symmetry cables sustain spanwise-synchronized Karman shedding at moderate-to-high inclinations, concentrating fluctuation energy in a dominant low-rank mode. Deep grooves disrupt shedding coherence, deflect the recirculation zone laterally, and spread energy across broadband scales. Mean lateral force and lateral-force fluctuations are therefore decoupled: the quasi-circular (1 × 19) cable has minimal mean lateral force but strong periodic fluctuations, while the deep-grooved (3 × 7) cable has weak fluctuations but appreciable mean lateral force. These results support construction-dependent cable selection and aerodynamic load modeling.
ER -