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首页> 外文期刊>International journal of structural stability and dynamics >Alpha-Modification of Cubic B-Spline Direct Time Integration Method
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Alpha-Modification of Cubic B-Spline Direct Time Integration Method

机译:立方B样条直接时间集成方法的α-修改

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摘要

Recently, a conditionally stable explicit time integration scheme using the cubic B-spline function was proposed for solving the structural dynamic problems. This paper presents a new unconditionally stable version of the previous algorithm, based on the uniform cubic B-spline piecewise polynomial approximations and collocation method. First, the method is implemented to solve the differential equation of motion for the single-degree-of-freedom (SDOF) systems. Then, it is generalized for the multi-degree-of-freedom (MDOF) systems. In this paper, a simple step-by-step algorithm is presented for the proposed method, with the stability and accuracy analyses carried out. The unconditional stability of the method is achieved through use of an adjustable collocation parameter alpha. The computational accuracy and efficiency of the proposed method are demonstrated in three numerical examples.
机译:最近,提出了一种使用立方B样条函数的有条件稳定的显式时间积分方案,用于解决结构动态问题。 本文基于均匀的立方B样条分段多项式近似和搭配方法,提出了一种新的无条件稳定版本的先前算法。 首先,实现该方法以解决单级自由度(SDOF)系统的差分方程。 然后,它是针对自由度的多程度(MDOF)系统的推广。 在本文中,提出了一种简单的逐步算法,提出了所提出的方法,具有稳定性和精度分析。 通过使用可调焊接参数α实现该方法的无条件稳定性。 在三个数值示例中证明了所提出的方法的计算精度和效率。

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