波动力学

Percussive drilling ; rotary drilling ; penetration rate ; wave theory ; rock mechanics ; mathematical model ; force analysis

冲击钻井；旋转钻井；机械钻速；波动理论；岩石力学；数学模型；受力分析

Based on the existed wave mechanics and by means of the study of the motion and effect of particles in the propagation of waves, this article puts forward that mechanics' effect in the propagation of waves is not only comprised of "stress from deformation" but also of another different form of force——"applied force from motion" which is decided by velocity.

核工业二九O研究所，韶关 512026摘要：在原有波动学的基础上，通过对波传播质点的运动和作用进行研究，提出了波传播的力学作用不仅有因形变产生的应力，还存在着另一种由速度决定的不同形式的力——"动作用力"。

The relations between the parameters of the saturated porous micropolar theory and those of the corresponding one_phase medium are established by means of the Greetsma theory. It has merits that the physics parameters in our dynamic equations of the saturated porous micropolar medium have a definite physics meaning and are easy to be tested in laboratory.

借鉴Greetsma理论，建立了饱和多孔微极介质弹性本构方程力学参数与相应单相介质弹性参数的相互关系，使饱和多孔微极介质弹性波动方程中的物理参数具有明确的物理意义，易于在试验中确定。

From the water pressure test and the collapsing examples, the thesis analysis the force expression of Karst collapse in water table dropping down, and presents that the additional stress from water table descending in overlying soil layer and rock, which is equal to approximately the descending depth of water table, which can be applied to about ten meters descending depth.

针对地下水位波动引发的岩溶塌陷进行了专门性研究。通过试验文章指出了岩溶区地下水位受迫下降至基岩面以下时的力学效应为：附加力在一定范围内，与在基岩面以上一样，等于水位下降的幅度值，并与盖层下基岩中洞穴的形态及体积无关。

Combined with indoor experiments and concrete blasting engineering projects and according to the theories of elastics, dynamic waves and dynamic fracture mechanics, this chapter thoroughly discussed the influence of rock structure on energy distribution of explosive charge, stress wave and blasting results.

岩体对爆炸荷载反作用的研究：从辩证法的角度出发，提出了爆炸荷载与岩体之间是一种作用与反作用的关系，结合室内实验和具体的工程爆破实践，依据弹性理论、断裂力学理论和波动理论，详尽地讨论了岩体结构面对爆炸能量分布的影响、岩体结构面对爆炸应力波的反作用和岩体结构面对爆炸效果的影响等问题。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。