Meanwhile , the method of secondary calculation and secondary analysis was used to study the situation of the stress distribution and concentration near the pins holes on the early failure spot of the frame . those results provide the reference to the analysis of the crack in the partial structure 同时对车架上相关部位采用二次细化分析方法研究孔洞周围的应力分布与集中情况,为分析局部结构的裂纹产生原因提供参考;同时还研究了子模型分析方法在二次细化分析中的应用范围和技巧。
At present , more and more large tonnage ships are built with the development of ship industry , the force between hull and shipway increased , the damage of ship structure was also reported . but the existed method is not efficiently for calculating the distribution of force acted on forward during stern floating which is the moment of truth during ship launching , so it is important to calculate ship launching precisely and take measure to preclude such accident 目前随着船舶工业的发展,建造船舶吨位越来越大,船体所受滑道反力随之增大,在实际生产过程中已有船体局部结构不同程度损坏的报道,而现有的下水计算方法在下水的最危险时刻艉浮时滑道反力的分布情况方面的计算显得不够准确,如何准确进行计算并采取相应的措施来防止这类问题发生显得十分重要。
Statistic pattern recognition based on the combination of multiple classifiers is imposed in the char recognition step , which is helped to sub - classify the char by local structure character analysis . that is , first to recognize the car license plate chars roughly with combination of multiple classifiers , and then distinguishes the chars that are very similar in the statistic character by structure analysis . the effect is very good 字符识别部分引入了多分类器集成的统计识别模式,并辅之以局部结构特征分析法进行细分类,即首先用多分类器集成作总体的字符识别,对于部分统计特征非常相似的字符,再加以结构分析来区分,取得了良好的效果。
This paper introduces the calculation of the loads of different waves and the combination of sine wave and cosine wave . furthermore , stressing on discussing the corresponding problems of the fem of the whole structure and putting forward the basic principles of building a fleet . taking a fleet for example , the paper discusses the whole response of the fleet and the local response of it according to different load cases 本文介绍了船舶的波浪载荷计算及按动态载荷法进行载荷分量组合,而且研究了结构有限元模型的有关问题,给出了结构的模型化原则;本文以一条051舰为例,讨论了不同的工况下整船舰艇结构应力的响应以及局部结构的响应。
It is featured at the synthetic development strategy , the feature describing and modeling of part information , the object - oriented template process decision , the opening database structure , the automatic creating and outputting of process document . so some breakthrough has been made in the practicability and the universality of the system with above advanced technology 该系统的主要特点是:在总体布局及局部结构中系统体现综合式开发策略、采用特征编码技术进行零件信息特征描述、运用面向对象的可操作模板式工艺决策方法实,现工艺自动决策、数据库采用开放式结构、自动生成与输出工艺文件。
Making use of the ridge tracing results , the algorithm can obtain some attributes of the feature points . combining the attributes and the local structural information , it can identify and eliminate the false feature structures , so as to eliminate the false features . ( 3 ) in the matching section , a reference point orientation algorithm based on block direction and its sine component is given at first 前者把8邻域编码技术和查表法引入到纹线跟踪中,提高了纹线跟踪的速度;后者利用纹线跟踪的结果,提取指纹特征点的属性,并结合特征点的局部结构信息,总结出各种伪特征结构的特征,进而对其进行识别和滤除,达到滤除伪特征点的目的。