为明确缺陷尺寸对不同剩余强度评价方法保守性的影响,针对一系列不同长度和不同相对深度的缺陷,采用改进的ASME B31G准则、DNV RP F101规范和PCORCC方法分别对其进行剩余强度评价,比较发现缺陷的长度和相对深度对3种剩余强度评价方法的...为明确缺陷尺寸对不同剩余强度评价方法保守性的影响,针对一系列不同长度和不同相对深度的缺陷,采用改进的ASME B31G准则、DNV RP F101规范和PCORCC方法分别对其进行剩余强度评价,比较发现缺陷的长度和相对深度对3种剩余强度评价方法的保守性影响十分显著,尤其是对传统认为的过分保守的ASME B31G方法影响最为显著。展开更多
The sound ray tracing method can achieve higher accuracy in determining depths and plan positions with multibeam echo sounding system. In data processing, actual sound speed profile must be used in the method. However...The sound ray tracing method can achieve higher accuracy in determining depths and plan positions with multibeam echo sounding system. In data processing, actual sound speed profile must be used in the method. However, the method is too complicated. In order to overcome the shortcoming, this paper presents a new method, the position correction method. Two situations are considered in the new method, namely, change of sound velocity keeps constant gradient in whole water column (including N layers) or in different water layer.展开更多
文摘为明确缺陷尺寸对不同剩余强度评价方法保守性的影响,针对一系列不同长度和不同相对深度的缺陷,采用改进的ASME B31G准则、DNV RP F101规范和PCORCC方法分别对其进行剩余强度评价,比较发现缺陷的长度和相对深度对3种剩余强度评价方法的保守性影响十分显著,尤其是对传统认为的过分保守的ASME B31G方法影响最为显著。
文摘The sound ray tracing method can achieve higher accuracy in determining depths and plan positions with multibeam echo sounding system. In data processing, actual sound speed profile must be used in the method. However, the method is too complicated. In order to overcome the shortcoming, this paper presents a new method, the position correction method. Two situations are considered in the new method, namely, change of sound velocity keeps constant gradient in whole water column (including N layers) or in different water layer.
