摘要
为给工程设计提供基础,通过解析式对管箱压力作用下圆平板隔膜和球面隔膜的薄膜应力、弯曲应力及总应力分别进行了分析,并结合案例进行了计算比较。结果表明,周边固支时,随着径向位置离开中心,圆平板隔膜上的弯曲应力从拉应力转变为压应力。无论球面隔膜上周边简支或固支,所有总应力是压应力,且径向总应力大于周向总应力。球面隔膜周边固支时,靠周边范围的应力水平较低且周向总应力与径向总应力接近,周边处弯曲应力为零。总体上可断定球面隔膜优越于圆平板隔膜。提出了关于隔膜结构的建议。
In order to provide basement for engineering design, membrane stress, bend stress and synthesize stress of diaphragms under pres-sure of tube channel are analyzed by formulas, which include both of the circular flat-plate diaphragm and the spherical shape diaphragm. Calculation and compare of stresses are combined with case. The results are show that when perimeter of flat-plate diaphragm is fix support, its bend stress is from tension stress change into compress stress as radial far from diaphragm center. But no matter the perimeter of spheri-cal shape diaphragm is fix support or simple support, all of the stress is always compress stress, and radial synthesize stress is always greater than circumferential synthesize stress. When perimeter of spherical shape diaphragm is fix support, stress lever nearby perimeter is low, radi-al synthesize stress is close to circumferential synthesize stress, and bend stress at perimeter is equal to zero. In a word, it is conclude that the spherical shape diaphragm is superior to the circular flat-plate diaphragm. Some points about diaphragm structure are suggested.
出处
《液压气动与密封》
2015年第3期70-74,共5页
Hydraulics Pneumatics & Seals
关键词
密封
平板隔膜
球面隔膜
应力分析
管箱
换热器
seal
flat-plate diaphragm
spherical shape diaphragm
stress analysis
tube channel
heat exchange
