连续压机活动式机架变形与热力耦合特性研究

为研究连续压机机架变形及热力耦合效应对其性能的影响,根据人造板生产热压工艺,确定了高压段机架受载条件;基于CPS型压机机架,设计一种可活动式机架,根据材料力学理论分析、求解了活动式机架中主要构件的受载变形情况,确定了活动式机架立柱与上、下横梁的主要结构尺寸;利用软件建模分析方法,建立了活动式机架结构模型,得出机架温度场与热应力分布状况,分析了热力耦合效应与静载条件下机架结构的应力、应变分布状态。结果表明:热力耦合效应对活动式机架结构变形及其应力、应变状况的影响显著,其不仅会改变机架最大应力与应变的位置,还会显著增大应力与应变的幅值;因此,针对连续压机机架进行热力耦合分析具有重要实用价值,可为连续压机机架结构的设计与优化提供理论指导。

Study on the Deformation and Thermal Mechanical Coupling Characteristics of the Movable Frame of the Continuous Press

In order to study the influence of the deformation of the continuous press frame and the thermal mechanical coupling effect on its performance,the load-bearing condition of the high-pressure section frame was determined according to the hot pressing process curves of wood-based panels production.A movable frame was designed based on the CPS type press frame,and the load-bearing deformation of the main components in the movable frame was analyzed and solved according to the material mechanics theory,and main structural dimensions of columns,upper and lower beams were determined.Through using the software modeling analysis method,the structure model of the movable frame was established,the temperature field and thermal stress distribution of the frame were acquired,and the stress and strain distribution of the frame structure under the condition of thermal coupling effect and static load were analyzed.The result indicated that the thermal coupling effect has a significant effect on the deformation,stress and strain of the movable frame structure,which will not only change the position of the maximum stress and strain of the frame,but also significantly increase the amplitude of stress and strain.Hence,the thermal coupling analysis for the continuous press frame has a vital practical value,it can provide theoretical guidance for the design and optimization of the continuous press frame structure.