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Based on Large-displacement Non-linear Elastic Generalized Variational Principle, coupling effect of axial and flexural action, shearing strain energy, torsional strain energy of stiffening girder were considered, the large-displacement incomplete generalized potential energy functional of space coupling free vibration of a three-span self-anchored cable-stayed suspension bridge was presented. By constraint variation, fundamental differential equations of vertical flexural vibration, lateral flexural vibration, longitudinal vibration and torisional vibration were formulated, also presented the equations for the main tower with respect to longitudinal and lateral vibration. The linear free vibration differential equation was obtained when the nonlinear items were discarded. This approach provides theoretical basis for analysis of natural vibration character of self-anchored cable-stayed suspension bridges.

The key step is improved the national standards-the molybdoantimonyarsenate blue spectrophotometric method for the determination of arsenic content in tin smelting waste residue. The experimental results show that on the basis of GB/T 1819.5-2004, the reaction acidity instead 2.0mol/L, tartaric acid 10mL, coloration in water bath 20min, then colorimetric at wavelength of 850nm are the optimal conditions for determination. Using three samples of tin slag smelting arsenic verification of these conditions, precision and accuracy are good, the relative standard deviations are 0.91%、1.35%、1.07%, the recoveries are 100.01%、99.73%、99.98%, respectively.

The simulation results and the analysis of 3d body movement is still a difficult and hot issue. Although domestic and international counterparts is in a human body movement simulation has some results but they really difficult to meet demand, because height of the complexity of the calculation, or the need to put heavy parameters. Study the hot topic of object-oriented simulation system simulation method, qualitative simulation, distributed interactive simulation, virtual simulation, the multimedia simulation, simulation based on virtual reality.

Based on scheme of Dalian gulf cross-sea bridge, in this paper, a 3-dimensional FE model for Self-anchored cable-stayed suspension bridge is established with finite element program and pile-soil-structure interaction is simulated by use of the equivalent embed fixation model. Based on the FE model, model analysis is carried out and the effects of pile-soil-structure interaction on dynamic behavior of long-span self-anchored cable-stayed suspension bridge are specially studied. The seismic response analysis result considering that pile-soil-structure interaction was compared with that of without considering such interaction. The analysis result show that interaction reduced horizontal displacement in middle span of stiffening beam and top of tower, horizontal moment not only at bottom of tower, but also assistant piers. The research results provide some theoretical foundation to composite structure system.