论文部分内容阅读
本文用移位的逆幂法计算了汽车车架的频率和振型,计算结果和实验结果进行了比较。一般的梁单元中,要求单元的节点应处在梁的弯心轴上。本文使用的梁单元没有上述限制,即它的节点允许不在弯心轴上,这类单元叫做偏置的梁单元。利用这种单元的优点是可以更实际地模拟真实结构,从而提高计算精度。作者把一般梁单元及偏置梁单元的计算结果同实验结果进行了比较,并从弹性应变能的角度讨论了使用不同的梁单元对系统自振频率的影响。
In this paper, the frequency and mode shape of the car frame are calculated by the inverse inverse power method of displacement, and the calculation results are compared with the experimental results. In a typical beam element, the node of the required element should be on the bending mandrel of the beam. The beam element used herein does not have the above limitation that its nodes are allowed to not be on a mandrel, and such elements are called offset beam elements. The advantage of using this kind of unit is that it can simulate the real structure more realistically, thus improving the calculation accuracy. The author compares the calculation results of the general beam element and the offset beam element with the experimental results, and discusses the influence of using different beam elements on the natural frequency of the system from the perspective of elastic strain energy.