某沼气发酵罐风载荷响应的动力学分析与计算

The Dynamic Analysis and Calculation of Wind Load Response for a Biogas Fermentation Tank

文章将发酵罐分成上、下两部分,根据国家标准GB50009-2012分别计算出各段所承受的风载,并利用ANSYS对罐体进行模态分析、风载荷诱导分析,得到罐体前五阶阵型及频率,在风载作用下导致罐体出现弯曲、扭曲以及弯曲与扭曲组合的不同程度的变形,并获得罐体的位移分布规律及应力分布情况。最大位移位于发酵罐出料口位置,其值为0.352 mm,同时横向位移是产生发酵罐变形的主要因素,最大应力发生在发酵罐罐顶出气口及罐底出料口位置处,最大应力为55.7 MPa。

In this paper, the fermentation tank was divided into upper and lower parts, and wind load was calculated for each section respectively. The modal and wind load analysis were taken for the tank using ANSYS. The first five order formation of the tank and their frequency were obtained. Under the wind load, the tank body appeared bend, twist and the different degree of deformation that bend and twist combined. The displacement distribution and stress distribution of the tank were also obtained. The maximum displacement was located at the discharge outlet of the fermentation tank, the value of which was 0.352 mm, while the horizontal displacement was the main factor of deformation of fermentation tank. The maximum stress occurred at the top gas outlet and the bottom discharge outlet of the fermentation tank, and the value was 55.7 MPa.