压机组合框架结构的预紧参数优化

经典组合结构压机机架的预紧设计在以横梁为刚体的假设下,给出不开缝条件和预紧设计方法,与真实情况不符。在以横梁为弹性体的假设下,给出压机组合框架结构新的不开缝条件,并用温度场迭加法模拟因预紧产生的框架内力。文中采用约束变尺度法建立了确定预紧力和拉杆直径的优化计算模型,算例表明该方法可行。

Optimizing the preloading parameters of assembled framework hydraulic press

In classical preloading design of assembled framework hydraulic press,the condition that transverses' separating from brace and preloading design method is determined by the assumption that transverse is rigid.It is not agree with reality.In this paper,new separation condition was given in case that transverses is elastic,what is more,the internal forces in framework because of preloading is simulated by means of temperature field iteration.The writer set up an optimization-programming model to define preload and tension rod diameter by using constrained variable metric method.The illustration suggests that this method is feasible.