最新刊期
卷 10 ， 期 2 ， 1988
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- 摘要：This paper presents a matrix structural analysis of variable stiffness on the complete loading history of prestressed concrete grids with unbonded tendons. A model of torsional rigidity affected by moment is derived by the analogy of space truss, and the effect of torque on flexural rigidity is also studied. In order to calculate the increment of stresses in tendons, a corresponding equation is created. Comparison of calculation shows well agreement with the experimental results.635|10|0更新时间：2023-11-28
- 摘要：This paper introduces the comprehensive hydraulic testing set for many kinds of hydraulic elements with hydraulic drive, hydraulic regulation and hydraulic loading. It has rational structure compact arrangement, reliable characteristics and advanced technique. In order to reduce the energy loss in the hydraulic system of the testing set, 1 ad sensing control is used. The static and dynamic characteristics of the load sensing system are analysed with the method of numeral simulation on computer. the testing witk load sensing control results show energy may be saved obviously and the heat load in hydraulic system may be reduced effectively, then testing quality is improved and the volume cf oil case is lessened. The lead sensing valve design is satisfied with simplifying structure so that it may be used reliably for the fixed flow hydraulic system of the testing set or other machines.480|7|0更新时间：2023-11-28
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- 摘要：The B_*-axicm is introduced by professor Li Xiaochuan. Many studies on the B_*-axiom are made by him. Especially, he proves that if (X,d) is a metric space, d and d' are topology-equivalent, then in (X,d) B_*-axiom is true (?)(X,d') is a separable space. In this paper, the famous Nagata-Smirnov metrization theorem is employed to a metric space in which B_*-axiom is nontrue to make a one-point extension, and the extensional space is proved to be metrizable space.754|7|0更新时间：2023-11-28
- 摘要：This paper presents two energy functionals which are made as stationary values. Thus, the theorem of stationary value of weighted generalized potential energy and the theorem of stationary value of weighted generalized complementary energy are established. In the first theorem, the stress boundary weighting function must be equal to the internal weighting function while the displacement boundary weighting function is independen; and in the (?)econd theorem, the displacement boundary weighting function must be equal to the internal weighting function while the stress boundary weighting function is independent.756|8|0更新时间：2023-11-28
- 摘要：This paper presents a new method by using mass and acceleration parameters for balancing inertial force of mechanism. Compared with other balance methods, this one is simple, clear and superior in regularity when the balancing equation of complex mechanism is established, and its solving procedure is also easy. The new methcd is convenient to learn and use as well as convenient to program.640|7|0更新时间：2023-11-28
- 摘要：This paper suggests a calculation formula for eccentrically loaded brickwork or column with biaxial bending in terms of ultimate strength design method. The coefficients of the formula, are compiled as design charts so that the formula can be directly used for design of this kind of structural members.438|8|0更新时间：2023-11-28
- 摘要：This paper presents a method of solving the problem of Chinese charactor information processing by building special Chinese charaacter library and simplifying Chinese character input/output technique in real-time supervisory system. It is successful to apply this method to the TF-200 Data Processing System. This method can be applied to other similar system. It is feasible to use Chinese characters in the language environment which Operation System (OS) supports.479|7|0更新时间：2023-11-28
- 摘要：In the utilization of the Kaiser Effect of AE as a method of estimating the gecstress in rock, it is very important to eliminate the noise induced at the ends cf a specimen, so sponge pads are put between the upper and lower end surfaces of specimens and bearing plates. In this paper, the attenuation behavior of sounds emitted by AE simulator and propagating in sponges are quantitatively measured. The eliminaion of noise by sponge effect is confirmed by the Kaiser Effect.447|8|0更新时间：2023-11-28
- 摘要：This paper presents some ideas of graph theory which are led int(?) structural matrix analysis. The main contents of this paper are the principal points of the graph theory, the computative principles of the node method and the mesh method.683|8|0更新时间：2023-11-28
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