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Un físico redefine los criterios de diseño de las bicicletas para mejorar su rendimiento
  • India - English
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News provided by

DAHON

Jul 03, 2023, 21:23 ET

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Un físico revela los defectos de diseño de las bicicletas comunes y propone soluciones

OLNEY, III., 4 de julio de 2023 /PRNewswire/ -- El presidente del fabricante líder de bicicletas plegables DAHON, el Dr. David Hon, ha anunciado que ha descubierto fallos de diseño en varios tipos de bicicletas, incluidas las bicicletas de montaña, las bicicletas de carretera y algunas bicicletas eléctricas. Al examinar la flexión del cuadro y su impacto en el rendimiento, el Dr. Hon ha desarrollado métodos teóricos y experimentales para la medición práctica de la flexión del cuadro. Una serie de artículos detallarán estos hallazgos y propondrán mejoras para optimizar la velocidad y el rendimiento.

La tradicional "bicicleta de seguridad", con triángulos delanteros y traseros tubulares, ha sido el diseño estándar desde finales del siglo XIX. Si bien esta estructura ha demostrado ser exitosa, han surgido excepciones con la introducción de bicicletas plegables y bicicletas de montaña de cola blanda. La investigación del Dr. Hon tiene como objetivo abordar estos desafíos de diseño y brindar soluciones para mejorar el rendimiento en todas las categorías de bicicletas.

Centrándose en el eje de pedalier (BB) como componente clave en la flexión del cuadro, el Dr. Hon ha desarrollado un modelo que correlaciona los movimientos del pedalier con la fuerza de pedaleo. Esta relación entre los movimientos del pedalier y la fuerza de pedaleo es muy relevante para la flexión del cuadro. Usando una plataforma de prueba CEN de la UE modificada, se probaron 45 bicicletas de varios tipos para medir la energía de flexión y la eficiencia de pedaleo. Se encontró que los resultados se corroboran con experimentos de conducción. Los resultados revelaron hallazgos importantes, algunos sorprendentes (no todos), incluidos:

  • Las ruedas y cuadros más pequeños, así como los cuadros triangulados, son más rígidos.
  • Las bicicletas BMX resultaron ser las más rígidas.
  • El cable DELTEC, que une el tubo de dirección al cuadro, mejora significativamente la rigidez y la velocidad de las bicicletas plegables monotubo, superando a todas las bicicletas de rueda grande sometidas a prueba. DELTEC destaca como un excelente remedio para las bicicletas plegables monotubo.
  • Las bicicletas de cola blanda mostraban una flexibilidad excesiva en el eje trasero, y la bicicleta plegable BXX fue identificada como la más blanda debido a su pivote de suspensión trasera excepcionalmente bajo (ampliamente conocido en la industria), lo que provocaba que la bicicleta se bamboleara seriamente al pedalear.
  • Las bicicletas más blandas eran hasta un 15% más lentas que las más rígidas al subir una cuesta empinada de 20°.

El Dr. Hon destaca la importancia de la eficacia de la propulsión en el diseño de cuadros de bicicleta para carreras, escalada y desplazamientos diarios. La próxima serie de artículos se titulará así:

  1. La bicicleta plegable: Problemas y soluciones
  2. Rigidez de la bicicleta frente a eficiencia de pedaleo
  3. Bicicletas de cola blanda: Problemas y soluciones
  4. Rendimiento de las bicicletas rígidas

La serie propondrá mejoras viables para la mayoría de las categorías de bicicletas, con el objetivo de optimizar la velocidad y el rendimiento.

Para más información y acceder a los artículos, visite el sitio web de DAHON en www.dahon.com.

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