Authors

Abstract

This study addresses the limitations in current finite element analysis (FEA) models of wind-induced response in plastic greenhouses, focusing on the oversimplification of modeling and the neglect of fluctuating wind effects. By deriving dynamic equations of motion for the greenhouse under wind loading and incorporating fluctuating wind through the Davenport wind speed spectrum, the study uses ABAQUS software to create both binding and contact models for a flat-elliptical pipe greenhouse (FEPG). The results emphasize the significant impact of fluctuating wind and the interactions between structural components on wind-induced responses. This work contributes to the design of more resilient greenhouses by enhancing the accuracy of wind response predictions, thereby improving the theoretical framework for FEPG design and providing a more comprehensive approach to wind-induced vibration analysis.

Abstract in Chinese

本研究针对当前塑料大棚风致响应有限元分析（FEA）模型中存在的过度简化建模和忽视脉动风效应的问题展开。通过推导温室在风荷载下的动态运动方程，并采用Davenport风速谱模拟脉动风，利用ABAQUS软件建立了平椭圆管塑料大棚（FEPG）的约束模型和接触模型。研究结果表明，脉动风和结构部件之间的相互作用对风致响应有显著影响。本研究通过提高风致响应预测的准确性，为温室设计提供了更为可靠的理论支持，进一步完善了FEPG设计理论框架，并为风致振动分析提供了更全面的方法。