|
|
以下摘自计算书
"
Preliminary Calculations
Ratio1 = Do / t =2018.8/9.4= 214.77
Ratio2 = L / Do =4757/2018.8= 2.3564
Value of A from Fig.G (Part D), A =0.000183
Value of B from External Pressure Chart HA-4(based on Temp=200) B =16.52
Pmax = (4 / 3) * B / (Do / t)
=(4/3)*16.52/(2018.8/9.4)= 0.1026 MPa
Maximum unsupported length for given shell thickness Lmax = 4899 mm
@External Pressure Pmax=0.1026 >= Pext=0.1[MPa] (U=97.4%) OK
Required Minimum Thickness Due to External Pressure Incl.Allow.:9.9 mm“
搞不懂,为什么计算明明是9.4mm,最后却跳出来一个9.9mm.
我们用料是10mm.
现在客户问了:
“”Calculations state that the “Required Minimum Thickness Due to External Pressure including Allowance is 9.9 mm. This is just 0.1 mm less than the Shell thickness of 10.00mm. If the Negative Tolerance/Thinning Allowance is increased, the 10.00 mm thickness of the Shell is inadequate. Clarification and details are required to ensure everything has been considered thoroughly.有道翻译是:计算表明,“由于外部压力(包括余量)所要求的最小厚度为9.9毫米。这只是0.1毫米比外壳厚度10.00毫米。如果增加负公差/减薄余量,则壳体的10.00 mm厚度不足。需要澄清和详细说明,以确保一切都得到充分考虑。“
客户又问:sanding of the sheet as part of the manufacturing process. Therefore, the total thickness will be 10.0mm (9.4mm + 0.6mm). The software calculations produce a thickness of 9.9mm. Please clarify the discrepancy. 有道翻译是:制造商已指出9.4毫米为最低要求厚度。并指出,0.6mm是作为一个综合考虑砂光片作为制造过程的一部分。因此,总厚度为10.0mm (9.4mm + 0.6mm)。软件计算得出的厚度为9.9毫米。请澄清差异。
现在我该怎么回答。求大神
|
评分1
-
查看全部评分
|
|