%0 Journal Article
%T Analysis of deflection and dynamic plant characteristics of Cyperus malaccensis Lam
%A Arata Myoga
%A Atsuya Kitagawa
%A Hiroaki Hayashi
%A Hiroaki Shimada
%A Mana Shioya
%A Shin-ichi Satake
%A Yasuo Kogo
%A Yukihisa Tokunaga
%J Plant Production Science
%D 2019
%R https://doi.org/10.1080/1343943X.2019.1588075
%X ABSTRACT In this study, flexural rigidity, natural frequency, and damping coefficient of Cyperus malaccensis Lam. with long stems were measured for application for fluid¨Cstructure interaction simulation in a field. Numerical solutions of deflection and natural frequency were calculated by ANSYS with finite element method (FEM). The triangular cross-section shape of C. malaccensis stem has a big neighbourhood of the root and the cross-section has taper structure to become small towards tip direction. Two numerical simulation models for FEM have Model A with a triangular prism shape and Model B with a truncated trigonal pyramidal shape to evaluate the effects of stem tapering. Because of large C. malaccensis stem deflection, an equation for nonlinear deflection was introduced to solve a problem regarding flexural rigidity. Natural frequencies of the stem were estimated using amplitude ratio during stem swinging by forced vibration, captured using a high-speed camera. The Model B corresponded with the measurement, and the results suggested that the stem characteristics were affected by cross-section shape. Damping coefficient was calculated using free vibration response, which was consistent with the analytical solution and numerical data calculated using measured characteristics. Abbreviations: C. malaccensis: Cyperus malaccensis; FEM: finite element method; GIAHS: Globally Important Agricultural Heritage Syste
%U https://www.tandfonline.com/doi/full/10.1080/1343943X.2019.1588075