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ASME XII 338罐车疲劳分析
Fatigue Analysis. The design shall take into account the effect of cyclic loads on the inner vessel and its attachments during normal conditions of operation from mechanical loads obtained from the load factors specified in Table 1-4.4-2 and design pressure using 109 cycles for loads in Table 1-4.4-2 and 3 × 105 cycles for pressure. Fatigue life analysis shall be in accordance with ASME Code, Section VIII, Division 2, Appendix 5. The Usage Factor shall not exceed 1.0. In fatigue evaluation of any item designed to withstand more than one load case, the maximum loadings in each direction from all applicable load cases shall be considered to act simultaneously in determining the magnitude of alternating stresses.
？压力载荷会循环 3 × 105 次吗
？每种载荷单独计算应力幅吗
？最后一句如何理解
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