刀盘是硬岩掘进机(TBM)的关键部件,为了研究刀盘刀具与掘进面耦合作用下载荷分布与变化规律,建立了某供水工程TBM刀盘-岩石相互作用的三维分析模型,基于显式动力学方法模拟TBM刀盘掘进过程,研究掌子面岩体的损伤失效状态以及刀盘刀具的...刀盘是硬岩掘进机(TBM)的关键部件,为了研究刀盘刀具与掘进面耦合作用下载荷分布与变化规律,建立了某供水工程TBM刀盘-岩石相互作用的三维分析模型,基于显式动力学方法模拟TBM刀盘掘进过程,研究掌子面岩体的损伤失效状态以及刀盘刀具的动态掘进载荷。研究得到了全盘刀具三向力载荷及刀盘总载荷(总推力、总扭矩),其中刀盘扭矩平均值1 560 k N·m,最大值5 880 k N·m,推力平均值3 444 k N,最大值7 296 k N;通过工程实例验证,得到实测载荷值稍大于仿真值,总推力误差为15.74%,总扭矩误差为15.38%,验证了仿真结果的有效性。在此基础上,对刀盘的动静态响应特性进行研究,得到刀盘在极限工况下最大应力100 MPa,最大变形0.695 mm,确定刀盘有足够的刚度强度。展开更多
This study reports verification results of hindcast data of four systems in the subseasonal-to-seasonal(S2S)prediction project for major stratospheric sudden warmings(MSSWs)in northern winter from 1998/99 to 2012/13.T...This study reports verification results of hindcast data of four systems in the subseasonal-to-seasonal(S2S)prediction project for major stratospheric sudden warmings(MSSWs)in northern winter from 1998/99 to 2012/13.This report deals with average features across all MSSWs,and possible differences between two MSSW types(vortex displacement and split types).Results for the average features show that stratospheric forecast verifications,when further averaged among the four systems,are judged to be successful for lead times around 10 d or shorter.All systems are skillful for lead times around 5 d,whereas the results vary among the systems for longer lead times.A comparison between the MSSW types overall suggests larger forecast errors or lower skill for MSSWs of the vortex split type,although the differences do not have strong statistical significance for almost all cases.This limitation is likely to at least partly reflect the small sample size of the MSSWs available.展开更多
Japanese IMS-VHT project on the Virtual Heat Treatment tool for monitoring and optimising HT process in relation with the international cooperative programs is briefly introduced. This project motivates to develop vir...Japanese IMS-VHT project on the Virtual Heat Treatment tool for monitoring and optimising HT process in relation with the international cooperative programs is briefly introduced. This project motivates to develop virtual tools for computer to optimize the heat treatment condition and to support decision for HT operation by knowledge based database in addition to process simulation. As one of the activities with the cooperation of the Society of Materials Science, Japan and the Japan Society for Heat Treatment, a benchmark project is undergoing. This includes simulation of carburized quenching process of a cylinder, disc, and ring as well as a helical gear by use of common data of materials properties and cooling characteristics by several available simulation programs. A part of the newly obtained results is presented as an interim report.展开更多
ADE Verifier是Cadence New ADE家庭成员中的重要一员,它主要用于项目管理和验证。Verifier主要功能;(1)可以在I C设计项目中统一管理仿真case与指标对应关系,手动/自动刷新ADE的最新仿真结果并显示其指标通过情况;(2)还可以通过一键完...ADE Verifier是Cadence New ADE家庭成员中的重要一员,它主要用于项目管理和验证。Verifier主要功能;(1)可以在I C设计项目中统一管理仿真case与指标对应关系,手动/自动刷新ADE的最新仿真结果并显示其指标通过情况;(2)还可以通过一键完成项目所有仿真并以简明的界面给出仿真结果和spec达成与否等信息。(3)其流程具有高的统筹性,高效性,操作简单等优点。同时该流程能够提高项目设计规范性,仿真完备性,从而提高芯片设计成功率。本文针对海思公司一个实际ADC项目验证了Verifier flow,在整个流程中可以直观清晰查看整个项目各指标状态和达成情况;结合Matlab在New ADE的集成功能,调用Mat l ab计算的结果也可以直接在ADE和Verifier中显示,基本达到了一键完成所有仿真,大大降低了项目换代,项目管理和项目验证而投入的人力成本。展开更多
文摘刀盘是硬岩掘进机(TBM)的关键部件,为了研究刀盘刀具与掘进面耦合作用下载荷分布与变化规律,建立了某供水工程TBM刀盘-岩石相互作用的三维分析模型,基于显式动力学方法模拟TBM刀盘掘进过程,研究掌子面岩体的损伤失效状态以及刀盘刀具的动态掘进载荷。研究得到了全盘刀具三向力载荷及刀盘总载荷(总推力、总扭矩),其中刀盘扭矩平均值1 560 k N·m,最大值5 880 k N·m,推力平均值3 444 k N,最大值7 296 k N;通过工程实例验证,得到实测载荷值稍大于仿真值,总推力误差为15.74%,总扭矩误差为15.38%,验证了仿真结果的有效性。在此基础上,对刀盘的动静态响应特性进行研究,得到刀盘在极限工况下最大应力100 MPa,最大变形0.695 mm,确定刀盘有足够的刚度强度。
基金supported by JSPS KAKENHI (Grant No. JP17H01159)
文摘This study reports verification results of hindcast data of four systems in the subseasonal-to-seasonal(S2S)prediction project for major stratospheric sudden warmings(MSSWs)in northern winter from 1998/99 to 2012/13.This report deals with average features across all MSSWs,and possible differences between two MSSW types(vortex displacement and split types).Results for the average features show that stratospheric forecast verifications,when further averaged among the four systems,are judged to be successful for lead times around 10 d or shorter.All systems are skillful for lead times around 5 d,whereas the results vary among the systems for longer lead times.A comparison between the MSSW types overall suggests larger forecast errors or lower skill for MSSWs of the vortex split type,although the differences do not have strong statistical significance for almost all cases.This limitation is likely to at least partly reflect the small sample size of the MSSWs available.
文摘Japanese IMS-VHT project on the Virtual Heat Treatment tool for monitoring and optimising HT process in relation with the international cooperative programs is briefly introduced. This project motivates to develop virtual tools for computer to optimize the heat treatment condition and to support decision for HT operation by knowledge based database in addition to process simulation. As one of the activities with the cooperation of the Society of Materials Science, Japan and the Japan Society for Heat Treatment, a benchmark project is undergoing. This includes simulation of carburized quenching process of a cylinder, disc, and ring as well as a helical gear by use of common data of materials properties and cooling characteristics by several available simulation programs. A part of the newly obtained results is presented as an interim report.
文摘ADE Verifier是Cadence New ADE家庭成员中的重要一员,它主要用于项目管理和验证。Verifier主要功能;(1)可以在I C设计项目中统一管理仿真case与指标对应关系,手动/自动刷新ADE的最新仿真结果并显示其指标通过情况;(2)还可以通过一键完成项目所有仿真并以简明的界面给出仿真结果和spec达成与否等信息。(3)其流程具有高的统筹性,高效性,操作简单等优点。同时该流程能够提高项目设计规范性,仿真完备性,从而提高芯片设计成功率。本文针对海思公司一个实际ADC项目验证了Verifier flow,在整个流程中可以直观清晰查看整个项目各指标状态和达成情况;结合Matlab在New ADE的集成功能,调用Mat l ab计算的结果也可以直接在ADE和Verifier中显示,基本达到了一键完成所有仿真,大大降低了项目换代,项目管理和项目验证而投入的人力成本。
