共查询到17条相似文献,搜索用时 95 毫秒
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机械多体系统动力学可视化仿真方法研究 总被引:1,自引:0,他引:1
应用低序体阵列描述多体系统拓扑构型,采用AutoDesk公司的MechanicalDeskTop(MDT)建立三维几何模型,使用AVI数字视频压缩对多体系统的运动过程进行可视化处理,实现多体系统动力学可视化仿真,采用面向对象的程序设计方法,开发了集成化的软件系统MDAS。该系统可者多体系统动力学计算机、数据处理和多体系统可视化仿真,最后,以带有太阳帆板的复杂卫星系统为例,对MDAS软件的合理性,有效性和正确性进行了分析验证。 相似文献
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网络技术迅速发展,网络规模曰益扩大,传统的入侵监测系统的功能受到很大限制。基于分布式计算的分布式入侵监测技术是解决问题的好方法。本文首先简要介绍网络安全现状、入侵检测技术和CORBA技术,然后给出应用CORBA建立的分布式入侵监测系统体系结构。 相似文献
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基于WEB分布式仿真的CORBA/JAVA实现方法 总被引:1,自引:0,他引:1
基于Web的分布式仿真是目前仿真技术发展的最新分支,对研究仿真软件的集成与重用具有重要意义。文章分析介绍了面向对象的仿真技术、CORBA机制、JAVA技术,提出了基于三者结合的方法开发基于CORBA软总线的开放式体系结构和支撑框架,以此实现基于Web的分布式仿真应用系统,最后阐述了CORBA/JAVA开发基于Web的仿真系统的优势与不足。 相似文献
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多体系统动力学数值解法 总被引:6,自引:0,他引:6
多体系统动力学研究的主要内容动力学建模与数值解法是多体系统动力学研究的主要内容之一。对多体系统动力学方程及其动力学数值解法的研究成果进行了较为全面的阐述。多体系统动力学及动力学方程进行了简单的归纳和总结,多体系统动力学数值求解,特别是刚柔耦合多体系统微分/代数方程的数值解法等研究热点进行了详细的阐述,并简要展望了多体系统动力学数值解法今后的发展趋势,为多体系统动力学计算机仿真奠定了基础。 相似文献
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In this paper, a new hybrid parallelisable low order algorithm, developed by the authors for multibody dynamics analysis,
is implemented numerically on a distributed memory parallel computing system. The presented implementation can currently accommodate
the general spatial motion of chain systems, but key issues for its extension to general tree and closed loop systems are
discussed. Explicit algebraic constraints are used to increase coarse grain parallelism, and to study the influence of the
dimension of system constraint load equations on the computational efficiency of the algorithm for real parallel implementation
using the Message Passing Interface (MPI). The equation formulation parallelism and linear system solution strategies which
are used to reduce communication overhead are addressed. Numerical results indicate that the algorithm is scalable, that significant
speed-up can be obtained, and that a quasi-logarithmic relation exists between time needed for a function call and numbers
of processors used. This result agrees well with theoretical performance predictions. Numerical comparisons with results obtained
from independently developed analysis codes have validated the correctness of the new hybrid parallelisable low order algorithm,
and demonstrated certain computational advantages. 相似文献
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Modular Simulation in Multibody System Dynamics 总被引:2,自引:0,他引:2
The dynamic analysis of complex engineering systems likeautomobiles is often relieved by a modular approach to make it treatableby a team of engineers. The modular decomposition is based onengineering intuition of corresponding engineering disciplines. In thispaper, a modular formulation of multibody systems is proposed which isbased on the block representation of a multibody system withcorresponding input and output quantities. Advantages of this modularapproach range from independent and parallel modeling of subsystems overthe easy exchange of the resulting modules to the use of differentsoftware for each module. However, the modular simulation of the globalsystem by coupling of simulators may result in an unstable integrationif an algebraic loop exists between the subsystems. This numericalphenomenon is analyzed and a method of simulator coupling whichguarantees stability for general systems including algebraic loops isintroduced. Numerical results of the modular simulation of aslider-crank mechanism are presented. 相似文献
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Multibody System Dynamics: Roots and Perspectives 总被引:10,自引:0,他引:10
The paper reviews the roots, the state-of-the-art and perspectives of multibody system dynamics. Some historical remarks show that multibody system dynamics is based on classical mechanics and its engineering applications ranging from mechanisms, gyroscopes, satellites and robots to biomechanics. The state-of-the-art in rigid multibody systems is presented with reference to textbooks and proceedings. Multibody system dynamics is characterized by algorithms or formalisms, respectively, ready for computer implementation. As a result simulation and animation are most important. The state-of-the-art in flexible multibody systems is considered in a companion review by Shabana.Future research fields in multibody dynamics are identified as standardization of data, coupling with CAD systems, parameter identification, real-time animation, contact and impact problems, extension to control and mechatronic systems, optimal system design, strength analysis and interaction with fluids. Further, there is a strong interest on multibody systems in analytical and numerical mathematics resulting in reduction methods for rigorous treatment of simple models and special integration codes for ODE and DAE representations supporting the numerical efficiency. New software engineering tools with modular approaches promise improved efficiency still required for the more demanding needs in biomechanics, robotics and vehicle dynamics. 相似文献