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1.
Numerical simulation on floating behavior of buoyancy tank foundation of anemometer tower 总被引：1，自引：0，他引：1
The intact stability and damage stability of a model of an anemometer tower with buoyancy tank foundation are computed by the finite element software MOSES in this paper. The natural period of the anemometer tower is discussed through frequency domain analysis. The influence of a single factor, such as towing point position, wave height, wave direction and wave period, on towing stability is discussed through time domain analysis. At the same time, the towing stability under the condition of various combinations of many factors is analyzed based on the meas- ured data of the target area. Computer simulation results show that the intact stability is preferable and the damage stability is sufficient under the condition of plenty of subdivisions. Within the scope of the buoyancy tank foundation, the higher the towing point position is, the better the stability is. Wave height has a great impact on the motion amplitude of buoyancy tank foundation, but the effect on the acceleration is not obvious; wave period has a great impact on the acceleration, while the effect on the motion amplitude is not obvious; following-waves towing is more conducive to safety than atry. 相似文献
2.
任何一项社会制度都是某种价值理念的体现,反过来讲,任何一种价值理念的客观存在必然体现在相应的制度上。社会主义和谐社会的价值理念必定客观体现在经济体制上、政治体制上、文化体制上、社会体制上。 相似文献
3.
为了提高鱼雷对目标的捕获与命中概率，提出了一种对某型鱼雷的搜索弹道进行改进的设想。通过建立数学模型与计算机模拟仿真，求解出了改进前与改进后的某型鱼雷的捕获、命中概率。仿真结果证明了该改进能有效提高鱼雷对目标的捕获与命中概率。 相似文献
4.
习近平总书记具有深厚的历史素养、深邃的历史眼光和严密的历史思维。党的十八大以来，习近平总书记就一系列重大历史问题进行了系统研究、客观阐述和科学评价，初步形成了富有深刻内涵和时代气息的马克思主义历史观。以“大历史观”的思维观察历史、以“人民至上”的理念解读历史、以“唯物辩证”的方法评价历史是习近平历史观的集中表现，彰显了其宏阔的理论视野、鲜明的人民立场、科学的逻辑思维等独特而深刻的理论品格。准确把握和科学认识习近平历史观的深刻内涵和价值意蕴，从历史深处汲取治国理政的智慧和力量，对于推进中国式现代化发展，实现中华民族伟大复兴具有重要的理论意义和现实意义。 相似文献
5.
An integrated finite element model(FEM)of offshore wind tower-foundation-soil is established by ABAQUS, where a large-scale composite bucket foundation with seven compartments inside is applied to supporting the upper wind tower. The dynamic response of the structure-foundation system is studied under three seismic waves with the same peak ground acceleration of 0.035g. It can be seen that the dynamic response increases at the beginning with the structure height, then it decreases because the structural damping increases due to the mass effect of the upper wind turbine generator system. It is shown that the anti-liquefaction capacity of the soil inside and underneath the foundation is improved owing to the high overburden pressure of the upper structure and the constraint effect of the bucket skirt and subdivisions. Moreover, the liquefaction resistance of the soil inside the middle compartment is improved to a higher degree than that inside the side compartments. 相似文献
6.
根据目前水面舰艇深弹武器系统的现状，分析了火箭深弹拦截鱼雷的必要性和可行性，提出了拦截鱼雷武器系统作战使用研究的重点和需要解决的几个问题，并提出不同战术背景条件下拦截鱼雷的作战使用研究方法，该方法对推动水面舰艇拦截鱼雷战法研究和提高我水面舰艇的防御作战能力具有十分重要的意义。 相似文献
7.
Bucket foundations[1 ,2]are a relatively newtype offoundation usedto support offshore structures .Each bucketfoundation consists of a thin cylindrical steel shell ,cappedwithalid of steel or concrete .Thefoundationcan penetrateinto sea floor when pumping … 相似文献
8.
二战期间,美、苏两国因为"德国问题"已经展开了激烈的争论。二战结束后,美、苏两国不同的对德政策理念进一步加深了双方矛盾。最终,德国成为美、苏对抗的前沿阵地,"德国问题"成为冷战爆发的催化剂。探讨冷战起源的德国因素可以揭示出冷战从地区性对抗到全球扩展的过程,从而进一步认清冷战的起源、性质与特征。 相似文献
9.
马克思主义的传播与研究是中国共产党创建的理论先导。20世纪初中国近代知识分子在"救亡图存"的艰难探索中实现了从"师资"向"师俄"的范式转化,逐渐聚焦并最终选择了马克思主义。建党时期马克思主义的传播与研究主要体现为四个结合,即马克思主义的多元性引入与早期马克思主义者的信仰性承接的结合,马克思主义的选择性传播与早期马克思主义者的整体性重构的结合,马克思主义的学理性研究与早期马克思主义者的大众化宣传的结合,马克思主义的中国式解读与早期马克思主义者的中国化探索的结合。这四个结合共同构筑了马克思主义进入中国的立体图景,为中国共产党的创建准备了干部队伍、理论基础、群众力量和实践基础,推进了中国共产党创建和马克思主义中国化的历史进程。 相似文献
10.
In 2010,the first offshore wind turbine with integrated installation was established in Qidong sea area of Jiangsu Province,China,which led to the implementation phase of one-step-installation technique based on the design and construction of large-scale bucket-top-bearing (LSBTB) bucket foundation.The critical technique of LSBTB bucket foundation included self-floating towing,penetration with adjustment of horizontal levelness,removability and one-step-installation.The process of one-step-installation included the prefabrication of LSBTB bucket foundation in onshore construction base,installation and debugging of wind power,overall water transportation of foundation and wind power system,and installation of foundation and offshore wind turbine on the appointed sea area.The cost of one-step-installation technique was about 5 000 Yuan/kW,which was 30%-50% lower than that of the existing technique.The prefabrication of LSBTB bucket foundation took about two months.During the one-step-installation process,the installation and debugging of wind power and overall water transportation need about one to two days in sea area within 35 m depth.After the proposed technique is industrialized,the cost will be further reduced,and the installation capacity is expected to be up to 500 wind turbines per year. 相似文献