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基于海况适应性的结构设计和模型验证的一种方法
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作者 张连成 《现代信息科技》 2019年第10期19-20,22,共3页
随着电子技术的发展和我国对海洋开发的进一步深入,对电子装备面对复杂海洋环境下的适应性提出了更高的要求和指标。该技术方法通过模型结合振动、颠震和冲击试验数据进行分析、处理、建模,达到一种对设备海况适应性接近真实的评价,能... 随着电子技术的发展和我国对海洋开发的进一步深入,对电子装备面对复杂海洋环境下的适应性提出了更高的要求和指标。该技术方法通过模型结合振动、颠震和冲击试验数据进行分析、处理、建模,达到一种对设备海况适应性接近真实的评价,能够在一定程度上反应电子装备的海洋环境适应性,费用低廉,效益可观。 展开更多
关键词 结构设计 试验数据模型 海况适应性
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A modified model of a single rock joint's shear behavior in limestone specimens 被引量:3
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作者 Dindarloo Saeid R. Siami-Irdemoosa Elnaz 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2016年第4期577-580,共4页
The shear behavior of a single rock joint in limestone specimens,under a constant normal load(CNL),was analyzed in this study.Test specimens with different asperity roughness were prepared and tested.Goodman's mod... The shear behavior of a single rock joint in limestone specimens,under a constant normal load(CNL),was analyzed in this study.Test specimens with different asperity roughness were prepared and tested.Goodman's model of a rock joint's shear behavior,under CNL,was modified to render a better representation of the data obtained.The model's applicability was validated.The proposed model showed better correlation with experimental data.It also,requires fewer variables.The steps to calculate all the necessary variables for the model are discussed. 展开更多
关键词 Limestone rockjoints Constant normalload Direct shear test Shear behavior
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Developing the Model and Environment for Validation of a Class-8 Truck
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作者 Mitchel J. Keil Upul Attanayake +1 位作者 Pavel Ikonomov Richard B. Hathaway 《Journal of Civil Engineering and Architecture》 2012年第7期777-786,共10页
Many studies have been conducted by analyzing crash data that included road profile, site conditions, vehicle configurations and weights, driver behavior, etc.. However, limited studies have been conducted evaluating ... Many studies have been conducted by analyzing crash data that included road profile, site conditions, vehicle configurations and weights, driver behavior, etc.. However, limited studies have been conducted evaluating the impact of these factors on crashes and/or rollover through simulations. This is mainly due to lack of availability of verified full vehicle flexible-body models. The verification process is costly as it requires instrumentation of a heavy vehicle, scanning of road surfaces, and collection of data by running the vehicle over different road conditions, performing various maneuvering, etc. This paper presents the reverse engineering process of a class-8 truck and validation of a full flexible-body simulation model of a Wabash 53-foot trailer against the strain data recoded from proving ground testing of an instrumented truck. Simulation results show that, with the exception of the noise from the strain gage data from instrumented test run at 30 mph, there is a good agreement in periodicity and relative amplitude with the ADAMS model. A comparison of strain data from the flex-body model and the instrumented truck shows that the modeling and verification approach presented in this paper can be confidently used to validate the full flexible-body models developed for specific analyses. 展开更多
关键词 ADAMS simulation class-8 truck flexible-body INSTRUMENTATION road profile.
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A general model of fatigue crack growth under variable amplitude loading 被引量:6
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作者 LIU JianTao DU PingAn ZHANG ZhenYu 《Science China(Technological Sciences)》 SCIE EI CAS 2012年第3期673-683,共11页
A general model of fatigue crack growth(FCG) in ductile alloys under variable amplitude loading is proposed based on the passivation-lancet theory and the crack closure concept.The model can capture the interactions o... A general model of fatigue crack growth(FCG) in ductile alloys under variable amplitude loading is proposed based on the passivation-lancet theory and the crack closure concept.The model can capture the interactions of single cycle overloading and underloading,sequential loading and spectrum loading effectively.Moreover,the retardation effect due to overloads and the acceleration effect due to underloading can be described quantitatively by a transition function of crack opening stress.The fatigue test data in 2024-T351,2024-T3 and 7075-T6 aluminum alloys under different types of variable amplitude loading and spectrum loading are used to validate the general model and the predictions by the general model are in good agreement with the test data.Furthermore,the predictions are also compared with the existing models,including FASTRAN,AFGROW and the state-space model,and the comparison results show that the general model predicts the FCG process more accurately. 展开更多
关键词 fatigue and fracture crack retardation effect variable loading crack closure effect plastic effect
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