According to the structure cha racteristies of a turbo-generator rotor shaft system,a torsionalvibration model of a large-size rotor shaft system with an elastic distributed structure has been estab-lished,and the tor...According to the structure cha racteristies of a turbo-generator rotor shaft system,a torsionalvibration model of a large-size rotor shaft system with an elastic distributed structure has been estab-lished,and the torsional vibration wave equation under the different boundary and initial conditions aswell as the impact of the damp of each shaft has been deduced.In the meanwhile,the inherent character-istics of a 300 MW turbo-generator rotor system is studied analytically and calculate with analyticalmethods.展开更多
Based upon Ihe differntial equations and their related boundary conditions givenin the prerious papert[1], this poper finds the analytical solution of non-Kirchhoff-Lovetheory for elastic circular plate with fixed bou...Based upon Ihe differntial equations and their related boundary conditions givenin the prerious papert[1], this poper finds the analytical solution of non-Kirchhoff-Lovetheory for elastic circular plate with fixed boundary conditions under uniform surfaceloading. However, for the sake of Saving conrputational work. the first orderapproximation theory can be further simplified in more rational bases.展开更多
An exact solution on the stress distribution of fillet welds is obtained in this paper This solution can be used not only for estimating the accuracy of the present design method of fillet welds but also for establish...An exact solution on the stress distribution of fillet welds is obtained in this paper This solution can be used not only for estimating the accuracy of the present design method of fillet welds but also for establishing a new design method展开更多
In this paper, it has been pro ved that the well_known Hu_Washizu variational principle is a pseudo_generalized variational principle(pseudo_GVP). The stationary conditions of its functional may satisfy all its fiel...In this paper, it has been pro ved that the well_known Hu_Washizu variational principle is a pseudo_generalized variational principle(pseudo_GVP). The stationary conditions of its functional may satisfy all its field equations and boundary conditions if all the variables in the functional are considered as independent variations, but there might exi st some kinds of constraints. Some new pseudo_GVPs are established to distinguis h them from genuine ones by the so_called inverse Lagrange multiplier method. Th e constrained Hu_Washizu principle, therefore, is proved to be equivalent with t he Hellinger_Reissner principle under the constraints of stress_strain relations .展开更多
基金Supported by the Education Ministry of China for the OutstandingYouth Teacher Fund(D196001,G00023)
文摘According to the structure cha racteristies of a turbo-generator rotor shaft system,a torsionalvibration model of a large-size rotor shaft system with an elastic distributed structure has been estab-lished,and the torsional vibration wave equation under the different boundary and initial conditions aswell as the impact of the damp of each shaft has been deduced.In the meanwhile,the inherent character-istics of a 300 MW turbo-generator rotor system is studied analytically and calculate with analyticalmethods.
文摘Based upon Ihe differntial equations and their related boundary conditions givenin the prerious papert[1], this poper finds the analytical solution of non-Kirchhoff-Lovetheory for elastic circular plate with fixed boundary conditions under uniform surfaceloading. However, for the sake of Saving conrputational work. the first orderapproximation theory can be further simplified in more rational bases.
文摘An exact solution on the stress distribution of fillet welds is obtained in this paper This solution can be used not only for estimating the accuracy of the present design method of fillet welds but also for establishing a new design method
文摘In this paper, it has been pro ved that the well_known Hu_Washizu variational principle is a pseudo_generalized variational principle(pseudo_GVP). The stationary conditions of its functional may satisfy all its field equations and boundary conditions if all the variables in the functional are considered as independent variations, but there might exi st some kinds of constraints. Some new pseudo_GVPs are established to distinguis h them from genuine ones by the so_called inverse Lagrange multiplier method. Th e constrained Hu_Washizu principle, therefore, is proved to be equivalent with t he Hellinger_Reissner principle under the constraints of stress_strain relations .
