大型塑料检查井刚强度分析及其结构优化

：针对大型塑料检查井刚强度计算和结构设计关键技术问题，采用ANSYS软件建立大型塑料检查井刚强度有限 元分析模型，并采用正交试验设计方法，研究检查井壁厚、主管直径、主管高度、子管直径和子管位置高度等尺寸参数对 应力和应变的影响规律。结果表明尺寸参数对检查井应力影响程度为：子管直径>子管位置高度>壁厚>主管直径> 主管高度。尺寸参数对应变影响程度为：主管高度>子管直径>主管直径>子管位置高度>壁厚；获得的检查井结构优 化尺寸为：壁厚8 mm，主管直径800 mm，主管高度800 mm，子管直径800 mm，子管位置高度100 mm。主管高度和子管 直径是设计过程中应重点考虑的因素。

Strength Analysis and Structure Optimization of Large Plastic Check Well

For large plastic check well, the strength analysis and structure optimization design are the key technical problems, ANSYS software was adopted to establish the plastic check well''s finite element analysis model. Also, orthogonal test method was used to study the effect of wall thickness of check well, diameter of main pipeline, the height of main pipeline, diameter of particles, location level of particles on stress-strain. Experimental results showed that the influence of size parameters on the stress were as follows: diameter of particles had bigger influence than location level of particles on stress-strain which had bigger effect than wall thickness of check well, and wall thickness had bigger effect than diameter of main pipeline and which had bigger influence than the height of main pipeline. Furthermore, the influences of size parameters on the strain were: the height of main pipeline was bigger than diameter of particles, diameter of particles was bigger than diameter of main pipeline, and diameter of main pipeline was bigger than location level of particles which was bigger than wall thickness of check well. The size of structure optimization was also obtained: wall was 8 millimeters, diameter of main pipeline 800 millimeters, the height of main pipeline 800 millimeters, diameter of particles 800 millimeters and location level of particles 100 millimeters.