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Dynamic response of a three-beam system with intermediate elastic connections under a moving load/mass-spring

Earthquake Engineering and Engineering Vibration 2020年第2期19卷 377-395页

作者： Feng Yulin Jiang Lizhong Zhou Wangbao School of Civil Engineering Central South UniversityChangsha 410075China National Engineering Laboratory for High Speed Railway Construction Central South UniversityChangsha 410075China

The objective of this research is to study the dynamic response characteristics of a three-beam system with intermediate elastic connections under a moving load/*** this study,the finite Sine-Fourier transform was performed for the dynamic partial differential equations of a simply supported three-beam system(SSTBS)under a moving load and a moving mass-spring,*** dynamic partial differential equations were transformed into dynamic ordinary differential equations relative to the time coordinates,and the equations were solved and the displacement Fourier amplitude spectral expressions were ***,based on finite Sine-Fourier inverse transform,the expressions for dynamic response of SSTBS under the moving load and moving mass-spring were *** proposed method,along with ANSYS,was used to calculate the dynamic response of the SSTBS under a moving load/mass-spring at different *** results obtained herein were consistent with the ANSYS numerical calculation results,verifying the accuracy of the proposed *** influence of the load/mass-spring’s moving speed on the dynamic deflections of SSTBS were *** has several critical speeds under a moving load/*** vertical acceleration incurred by a change in the vertical speed of SSTBS due to the movement of mass-spring and the centrifugal acceleration produced by the movement of massspring on the vertical curve generated by SSTBS vibration could not be neglected.

关键词： finite Sine-Fourier transform three-beam system moving load mass-spring critical speeds

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Research of Fast Cloth Simulation Based on mass-spring Model

Research of Fast Cloth Simulation Based on Mass-Spring Model

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2012 National Conference on Information Technology and Computer Science

作者： Cao Zhenfang State Key Lab of Virtual Reality Technology and Systems Beijing University of Aeronautics and Astronautics Beijing,China He Bing State Key Lab of Virtual Reality Technology and Systems Beijing University of Aeronautics and Astronautics Beijing,China

In cloth simulation based on the spring-mass model,algorithm dealing with super-elasticity reduces the simulation efficiency to some *** on the correction algorithm of modifying position and velocity,an improved algorithm is proposed which can improve the efficiency ***,for collision detection,a cloth tree updating algorithm is proposed to improve the balance of cloth tree and speed up cloth collision detection efficiency.

关键词： Cloth Simulation mass-spring Super-Elasticity

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An Efficient Way of Fabric Simulation

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Journal of Donghua University(English Edition) 2002年第1期19卷 44-48页

作者：钟跃崎王善元 College of Textiles Dong Hua University Shanghai 200051

A partide system model is presented for the simulation of fabric draping. The interaction of each partide is based on a refined mass-spring structure. Regarded the fabric material as an orthotropic continuum, the refinement of our model is focused on the construction of mechanical responses of bending and shearing springs by means of a piecewise polynomial approximation of KES-F testing data. In this way, the draping figure of a silk fabric, a wool fabric and a polyester fabric are simulated. The static final shape and animation of simulation proves that our model has developed an efficient technique on real fabric- drape modeling, and the little computation time of the simulation execution on a PC with Celeron 450 CPU may meet the requirement of real-time simulation.

关键词： fabric simulation, mass-spring system, KES-F empirical data, animation.

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