论文部分内容阅读
防风网气动特性参数是防风网结构没计中的重要参数。通过风洞试验的方法研究了透风率分别为29.9%和35.4%的蝶形、平板两类防风网的静力风荷载气动特性参数。结果表明,防风网风载体型系数背风面为负值,其绝对值远大于迎风面;迎风面风载体型系数,当透风率较小时为负值,较大时为正值,即防风网向后的吸力是主要作用力。防风网的压力损失系数、风载体型系数和阻力系数相互紧密联系,其值具有致性,随着前者的提高,后两者的值也提高,即防风抑尘效果越好,抗风安全性越差。防风网结构设计时,要统筹兼顾,权衡利弊,选其最佳结合点。
Windproof pneumatic characteristics of wind-proof network parameters are not counted in the important parameters. Through the wind tunnel test method, the aerodynamic parameters of the static wind load of the two types of windscreens, butterfly and flat, with the ventilation rates of 29.9% and 35.4% respectively, were studied. The results show that the leeward windward coefficient of the wind-proof net is negative, its absolute value is much larger than that of the windward side. The windward coefficient of the windward wind turbine is negative when the aeration rate is small, After the suction is the main force. The pressure loss coefficient, the wind load coefficient and the drag coefficient are closely related to each other. The value of the wind resistance network is concordant. With the increase of the former, the latter two values also increase, that is, the better the wind and dust suppression effect, the wind safety The worse. Windproof network structure design, we must make overall plans, weighing the pros and cons, choose the best combination of points.