| 1. | The influence of stress wave propagation on high acceleration measurement of projectile
应力波传播对弹丸实测超高值加速度的影响 |
| 2. | Since about ten years , the theory of determining the viscoelastic properties of solids by transient wave propagation methods is developed and perfected by scholar mr . blanc
最近十年来，用应力波传播方法对粘弹性材料性质的鉴定理论已被法国学者布兰克先生发展和完善。 |
| 3. | The present thesis reviews the development process of the theory of porous media and summarizes systematically the state and major progress of the wave propagation problem in the fluid - saturated porous media
本文回顾了含液多孔介质理论的发展历程，系统地总结了液饱和多孔介质中应力波传播问题的研究现状和主要成果。 |
| 4. | For the reason of the complexity of the problem , this study is hard . the main work introduced in this paper is as follows : k the dynamics equation of pipeline ( arbitrary rotary shell ) has been simplified and by which the calculating result by eigenline theory has tallied well with the result by experiment
本文所做主要工作： 1 、对管道在一维模型基础上受轴对称冲击载荷作用时的应力波传播特征作了分析并利用特征线法进行数值计算，将计算结果与实验结果进行了比较。 |
| 5. | In accordance with the characteristics of repeated impact load , and from the aspects of stress wave transmission , repeated impact wear , hardening and softening of repeated impact and plastic deformation of repeated impact , an experimental study on partial mechanics behaviors of samples bearing laser melted clad coating under repeated impact load was carried out
摘要根据多次冲击载荷的特性，从应力波传播、多冲磨损、多冲硬化与软化和多冲塑性变形方面，对带有激光熔覆层试样在多冲冲击载荷下的部分力学行为进行了试验研究。 |
| 6. | Differential equations for characteristic curves , velocity curves and slowness curves are given and the analytical expressions for wave fronts in orthotropic porous media are also obtained . the wave fronts in anisotropic fluid - saturated porous media are discussed in detail . in chapter 3 , the plane wave propagation in orthotropic fluid - saturated porous media is researched according to biot ' s theory and the concept of dynamic permeability
给出了正交各向异性液饱和多孔介质中弹性波的特征曲面，速度曲面以及慢曲面的微分方程，并给出了正交各向异性液饱和多孔介质中应力波波阵面的解析表达式，对不同含液饱和多孔介质中应力波传播的波阵面进行了研究。 |
| 7. | The mechanical properties of carbon - phenolic depends on the properties of each phase in it , and is evidently influenced by the manufacturing progress , while micro - mechanics provides the way to calculate the macro - mechanical properties of composites according to the properties and geometries of each phase in it , this method was utilized to study the constitutive relation and the characteristic of stress wave propagating in carbon / phenolic composite in this paper , the main progress follows as : the solidification technique of phenol - formaldehyde resin ( pf resin ) had been studied , and then the specimens of solidified pf resin were prepared successfully for study on the constitutive relation of solidified pf resin
碳酚醛的力学性能与各相的力学性能及体积百分比相关，并受其制备工艺的影响很大，而细观力学是以基体和增强相的实测力学性能数据和两相之间的几何关系为依据来计算复合材料的宏观力学性能，因此，本文采用细观力学方法研究了碳酚醛的本构关系及应力波传播特性。主要进展如下：为了研究碳酚醛的基体材料? ?氨酚醛树脂的本构关系，完成了氨酚醛树脂的固化工艺研究，成功地制备了固化氨酚醛试件。 |
| 8. | Comparing its results with those by ls - d yna , the accuracy of this algorithm was presented . moreover the failure process in concrete due to impact loading and the failure process of a steel bullet penetrating a concrete circular plane was demonstrated , which presented the dynamic transitional process from continuum to non - continuum . several different fundamental damage forms simulated by using this algorithm were discussed , comparing with the results from experiments
应用该模型对正交各向异性平板内的应力波传播、冲击载荷下混凝土平板的破坏以及钢弹侵彻混凝土圆板的破坏问题进行了研究，通过将计算结果与ls - dyna 、特征线法以及实验结果进行对比，证明了该模型的精确性和可靠性。 |
| 9. | Adopting relatively simple mechanical model and predigested boundary condition and taking a straight bar applied one end with an semi - sine impulse to simulate the rigid target impacted by a projectile as an example , the relation between the stress wave propagation and acceleration of projectile has been analyzed by theoretical deduction and computer simulation
摘要采用较为简单的力学模型和简化的边界条件，以直杆一端施加一半正弦载荷脉冲和模拟弹体冲击刚性靶为例，用理论推导和计算机仿真的方法分析应力波传播和弹体加速度的关系。 |
