The effect of vibratory stIess relief (VSR) is usuully evaluated with the indirect method of observing the change of amplitude fiequency response characteristics of structures, A new kind of evaluating method of VSR based on the ultrasonic time-of-arrival method (UTM), which can obtain the residual stress directly through measuring the propagation time of nim~sonic wave in the material, is presented. At first, the principle of the measuring method of residual stress based on UTM is analyzed. Then the measuring system of the method is described, which is in virtue of ultrasonic flaw detector and high-sampling-rote digital oscillograph. And a set of calibration system that contains a piece of standard specimen is also introduced. Experimental results prove the relation between the residuul stress and the propagation time of ultrasonic in workpieces. Finally, the measuring and calibration systems are applied in evaluating the effect of VSR. The final test resuits show that the method is effective.

针对高线加速度下热与振动复合环境试验系统中离心加速度对温度场分布的影响，研究了离心加速度与热的祸合机理以流体传热控制方程和固体三维传热方程为基础，建立了离心加速度与热的藕合关系式，并采用有限元分析的数值方法，计算了离心加速度作用下具有局部热源及内置物的温度场和流场根据流场分布分析了离心加速度与热藕合机理，给出了改善离心加速度下温度场均匀度的方法研究结果表明，离心加速度是造成温度箱中温度不均匀性的主要原因，和线加速度相比，离心加速度使温度场分布更加紊乱强迫对流以及合理安排内置物的位置是改善离心加速度下温度场均匀度的有效方法。

Based on neural networks, an approach is presented to identify the nonlinear hysteretic degrading structures. First, a neural network model is built according to the character of an actual nonlinear hysteretic degrading structure. Then the model is trained by a group of training samples that are obtained from experiments. Finally, the trained model is verified by another group of experimental data. The results show that the model can be used to predict the response of actual nonlinear hysteretic degrading structures. This will provide an efficient and new method to identify nonlinear hysteretic degrading systems.

提出一种基于静压轴承原理的新型测力缸塞系统。介绍该测力缸塞系统的工作原理和设计原理；对制造成功的该测力缸塞系统进行实验分析。实验结果表明，它不仅具有传统转缸系统的测力精度，而且在抗倾覆性和测力平稳性方面具有明显的优越性。