The Simulation Modeling Research of ship Mechanical Equipment Impulse Response

Abstract

With the constant development and application of computer information technology, especially in the field of computer application technology development, people's dynamics research, modeling and calculation on complex mechanical system are becoming more and more common and feasible. Based on the simulation modeling research of ship mechanical equipment impulse response, this paper mainly puts forward a kind of complex mechanical equipment dynamic response algorithm under the action of impact. In current research level in the industry, finite element method is often used because its research object is extensive, and the simulation modeling and calculation precision are relatively high. However, for concrete rigid displacement dynamics problems, it cannot meet the high quality requirements of grid and grid number, so it is very difficult to add complex dynamic boundary conditions, but also make each link more difficult in the process of modeling so as to increase the solution time. Based on the above problem, this paper takes marine complex mechanical equipment as the research object, and studies the subject by using the algorithm of dynamic impulse response. I. RESEARCH BACKGROUND Ship machinery equipment usually travels and performs the work tasks underwater. Certain reliability is generally needed under underwater explosion impulse condition. The reliability directly affects the vitality and combat effectiveness of the ship in very great degree. About research field and simulation modeling calculation method, the most commonly used ways include impact factor method, dynamic design analysis method, finite element analysis method and transfer matrix method. The most widely used is finite element method. The method has the advantages of relative low cost and convenient analysis. From the current development and application situation, it is still the main design and evaluation method of ship machinery and equipment in quite a few countries in the world. Though finite element analysis method is widely used in various fields in industry and aviation, however, it is very difficult to build a holistic finite element system model for large complex mechanical systems, especially in grid area, the grid density and the corresponding standard requirement are too high, which will likely lead to too large freedom degree, resulting in obvious increased amount of calculation. In this case, the system itself does not have the characteristics of high speed and large capacity. Eventually the simulation modeling and calculation results will have larger error phenomenon because of too coarse grid. Based on the existing finite element method, this paper puts forward a dynamic impulse response algorithm with the combination of dynamic design analysis theory, which can better handle this problem. More important is that it can more accurately reflect the nonlinear factors and multidisciplinary coupling, etc. existing in a large number of complex mechanical systems. This article here takes ship mechanical propulsion shafting, the elastomer, as focus object.