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10 June 2000, Volume 22 Issue 3
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    Research paper
    2000, 22(3):  0-0.  doi:10.6052/1000-0879-f2000-061
    Abstract ( 764 )  
    The front tracing methods including VOF and Level Set methods are reviewed in thepresent paper. These methods have been applied in a large number of engineering problems andillustrated here by an example: the Stefan problem. We also discussed the potential development ofthis technique in the future on dealing with surface such as phase interface, moving boundary, shockwave, etc.
    2000, 22(3):  0-0.  doi:10.6052/1000-0879-f2000-062
    Abstract ( 746 )  
    A detailed review of the evaluation methods of fatigue reliability of structural elementshas been made. Various the models for the fatigue reliability evaluation are classified into threetypes according to the status equations, that is, cumulative damage model, residual strength modeland fatigUe life model. Every model can find its own position in the engineering application, andhas some limits. Some discussions on the further development of the evaluation of fatigue reliabilityare made.
    2000, 22(3):  0-0.  doi:10.6052/1000-0879-f2000-063
    Abstract ( 868 )  
    This article presents a new method to es-timate fatigue life under spectrum load, accumula-tive destruction ratio method. According to the con-stant amplitude experimental results, this methodcan obtain the characteristics of paxent materialand estimate the fatigue life under spectrum loadwith accumulative destruction ratio method. Thismethod is easy to use and the result of estimationin some cases is better than that of other methods.
    2000, 22(3):  0-0.  doi:10.6052/1000-0879-f2000-064
    Abstract ( 784 )  
    Research on control design method onwindinduced vibrating comfort of TMD-tall steelstructure system is carried out in this paper. Calcu-lating formulae for vibrating acceleration of the con-trolled structurcs axe derived. The design table forfiuctuating amplifying coefficient of the controlledstructures and the control design steps are given.Tlle colnputational results show that the TMD isvery efficient for controlling wind vibration acceler-ation of structures.
    2000, 22(3):  0-0.  doi:10.6052/1000-0879-f2000-065
    Abstract ( 760 )  
    The effects of visco-ealstic materialdamped joints on modal parameters of beamsare investigated. The governing equations of theimpedances at the joints for translational and ro-tational motions are given by considering springswith complex stiffness. The natural frequencies andmodal loss factors can be obtained by solving theequations. Numerical result can be represented inthree dimcnsional curves, which can be used for pas-sive vibration control design directly
    2000, 22(3):  0-0.  doi:10.6052/1000-0879-f2000-066
    Abstract ( 859 )  
    For pole tower constructions in the trans-mission line, it is important to study optimaI three-point lifting in the pole tower integral hoisting. Amathematical model for three-point lifting of thepole tower integral hoisting is established in the pa-per. Software is developed to solve various difficultproblems of scheme design of three-point lifting inthe pole tower integral hoisting.
    2000, 22(3):  0-0.  doi:10.6052/1000-0879-f2000-067
    Abstract ( 725 )  
    In this paper, the structural characteristic of open-press fuselage was first analyzed. Thenits mechanics model simplification method for thestructural analysis by finite element method was rec-ommended. Its finite eIement analysis and structureoptimization were made for open-press fuselage withseveral practical examples. A remarkable effect onreducing its weight and increasing its strength andrigidity was achieved. It provided a theoretical basefor reliable design and improvement of the structure.
    2000, 22(3):  0-0.  doi:10.6052/1000-0879-f2000-068
    Abstract ( 745 )  
    The plates on the elastic foundation havealways been an interesting problem for scientist andengineers. The element-free method for plates onWinkler, two-parameter and elastic half space foun-dation is presellted in this paper. The shape func-tion of element-free method is introduced. The stiffness matrices of plates on elastic foundation are de-rived using variational principle. Numerical exam-ples are given and compared with other methods.It shows that this method enjoys a number advan-tages.
    2000, 22(3):  0-0.  doi:10.6052/1000-0879-f2000-069
    Abstract ( 1016 )  
    The displacement field of sand underuniformly distributed load is measured by meansof digital image relative analysis, and the measuredresults axe compared with the Boussinesq's calcu-lationed ones. The result indicates that the test issatisfactory. This method is fiIst successfully ap-plied to the test of the displacement field of soil andis a new method in measuring deformation in soilmodel test, and is also a more effective means forthe study of geotechnical engineering and founda-tion engineering.
    2000, 22(3):  0-0.  doi:10.6052/1000-0879-f2000-070
    Abstract ( 773 )  
    In Paxt I of this paper, a two-dimensionalanatomical1y-based biodynamic model of the humanlower extremity, which does not includ the effects ofmuscle, was established. In Part II of the paper)the biodynamic responses of that model is investi-gated in detail. In this Part of the paper, the mus-cle effects on the motion of tl1e lower extremity areinvestigated, When compaxed with the results ofa compatible phenomenological model for the samemuscle activation program, the present anatomicalmodel yields similar ...
    2000, 22(3):  0-0.  doi:10.6052/1000-0879-f2000-071
    Abstract ( 759 )  
    The viscoelastic properties of severalgelled crude oils are investigated by experiment withstress-controlled rheometer(RS75). It is found thatgelled crude oil has properties of typical viscoelasticsolid. The crude oil rheological structure at differentstates can be described with the viscoela-stic param-eters of shear oscillation.
    2000, 22(3):  0-0.  doi:10.6052/1000-0879-f2000-072
    Abstract ( 754 )  
    The flow of the viscoelastic fluid on arotating disk with the linear Maxwell's model wasstudied. The approximate analytic solution of thecoating thickness was given using the perturbationmethod. It was found that the increase of the elas-ticity modulus of coating materials is conducive tothe process of rotating coating.
    2000, 22(3):  0-0.  doi:10.6052/1000-0879-f2000-073
    Abstract ( 761 )  
    In this paper, the numerical simulationmethod of the near-field fiow properties of under-expanded high-speed jets was developed. The re-sults of shock-cell structure in the expansion regionnear nozzle-exit at several static pressure ratios weregiven, and the mechanism of pressure uniformationwas analyzed.