重型机械
重型機械
중형궤계
HEAVY MACHINERY
2015年
1期
32-36
,共5页
机架%预应力%拉杆结构%预紧
機架%預應力%拉桿結構%預緊
궤가%예응력%랍간결구%예긴
frame structure%pre-stressed%rod%preload
分析了螺栓式预应力机架结构的特点，推导了预应力拉杆的受力过程，证明了单个螺栓预应力结构本身并不能提高拉杆的刚度，也不能改善拉杆应力波动范围，中小型机架结构中应慎重使用；结合钢管矫直机两种主流的拉杆结构，分析不同初始预应力作用下机架的刚度，可以发现，通过多个预应力拉杆对上横梁的夹紧作用，可以提高整个机架结构的刚度，而且在同等重量的情况下施加同等预应力，短预应力预紧的效果优于拉杆全长预紧效果。
分析瞭螺栓式預應力機架結構的特點，推導瞭預應力拉桿的受力過程，證明瞭單箇螺栓預應力結構本身併不能提高拉桿的剛度，也不能改善拉桿應力波動範圍，中小型機架結構中應慎重使用；結閤鋼管矯直機兩種主流的拉桿結構，分析不同初始預應力作用下機架的剛度，可以髮現，通過多箇預應力拉桿對上橫樑的夾緊作用，可以提高整箇機架結構的剛度，而且在同等重量的情況下施加同等預應力，短預應力預緊的效果優于拉桿全長預緊效果。
분석료라전식예응력궤가결구적특점，추도료예응력랍간적수력과정，증명료단개라전예응력결구본신병불능제고랍간적강도，야불능개선랍간응력파동범위，중소형궤가결구중응신중사용；결합강관교직궤량충주류적랍간결구，분석불동초시예응력작용하궤가적강도，가이발현，통과다개예응력랍간대상횡량적협긴작용，가이제고정개궤가결구적강도，이차재동등중량적정황하시가동등예응력，단예응력예긴적효과우우랍간전장예긴효과。
The characteristics of the bolt pre-stressed structure is analyzed,stress of pre-stressed rod is derived,show that single bolt pre-stressed structure itself does not improve the stiffness,also does not improve the bar stress fluctuation range,small and medium type frame structure should be used cautiously;with two mainstream rod structure of steel tube straightener,stiffness of house with different initial prestressing force is analyzed,the clamping effect of several pre-stressed rod on the upper beam can improve the stiffness of the whole machine structure,under the condition with the same pre-stressed load and the same house weight,short pre-stressed structure is better than standard pre-stressed structure.
