structural computation
1.On the premise of satisfying all constraint conditions stipulated in the codes with the pipe thickness spacing, height and thickness of stiffener rings as variables and the total steel quantity per meter of pipe as objective function, the program is developed for structural stress computation and comparison of total steel quantity used so as to select the alternative with smallest total steel quantity per meter of pipe.
2.Using the unsteady aerodynamics step responses due to the structural deformation calculated by CFD(computation fluid dynamics) technique,the Volterra kernels are determined,and the generalized unsteady AIC(aerodynamics influence coefficients) in frequency-domain are obtained.
3.For this purpose we propose a set of real-timedata processing algorithms, for example, fast linear fit algorithm,structural method of waveform recognition, some algorithms of VCGsegmentation, VCG recognition and feature computation, etc.
4.By means of studying the structural dynamics optimization design that takes the displacement of physical measurement of structural response under motivated excitation as the target or constraint and utilizing the analytical method, the sensitivity computation formula of dynamic displacement response was derived and being successfully transplanted into the finite element program.
5.In the structural mechanics method, elastic thin wall column shell and thin slab theory is used in the computation, and consider two rigid conjunctions, adopt underground frame bending moment allotment method to admeasure the wall of a well and the scaleboard bending moment.
6.First, problems in the Marcus method of slab trip is pointed out, which lies in great variance between assumed computation model & loading model and real structural mechanism, resulting in inaccuracy of load transfer.
7.The numerical example on YH-Ⅱ super-computer has demonstrated that the above EBE-Lanczos iteration method can speed up the computation largely, and is one kind of effective solution methods for large-scale structural dynamical analysis problems.
8.Using the finite element structural analysis programme JJSAP, we have performed the analysis of static characteristics of the swivel-frame complex of the articulated vibratory compactor SP-48 of INGERSOLL-RAND Company. In the programme the contact problem in the complex has been specially handled effectively. Through the computation and experiment, the strength and stiffness properties have been analyzed and the weak points in the complex have been found, which laid a foundation for optimization of the structural parameters of the complex.
9.This paper gives a brief introduction to our research work in this area,including:parallel computation for element stiffness matrices, parallel direct solutions for finite element equations, parallel iteration solutions for finite element equations, parallel direct integration algorithm in dynamic analysis of structures, parallel algorithm for generalized eigenproblems and the applications of EBE technique in finite element structural analysis.
10.Abstract: This paper presents a solved computation method fo r non-stationary random response subjected to excitation based on the theory of vehicle dynamics, launch dynamics and random vibration．The dynamic and response characteristics of the selfpropelled gun launching duping travelling are studi ed, which is of value in structural design and practical operation of the system.
