Collaborative optimization method for damping ratios of high-speed rail seat suspension, primary vertical suspension and secondary vertical suspension
A secondary vertical and damping ratio technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as the lack of theoretical design methods for the system, difficulties in dynamic analysis and calculation, and unsatisfactory
Inactive Publication Date: 2015-12-09
SHANDONG UNIV OF TECH
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Problems solved by technology
However, according to the available information, since the high-speed rail is a multi-degree-of-freedom vibration system, it is very difficult to perform dynamic analysis and calculation on it. The theoretical design method of the system is not given, and most of the seat suspension, primary vertical suspension and secondary vertical suspension are studied separately, and with the help of computer technology, the multi-body dynamics simulation software SIMPACK or ADAMS / Rail respectively optimize and determine its size through solid modeling. Although this method can obtain relatively reliable simulation values and make the vehicle have better dynamic performance, however, due to the Mounting is a complex system coupled with each other. At present, it is difficult to achieve the best matching of the damping ratio of the high-speed rail seat and the vertical suspension system of the first series and the second series by modeling and designing the damping ratio of the suspension separately. , and with the continuous increase of the speed of high-speed rail, people have put forward higher requirements for the design of the damping ratio of the seat and the first and second vertical suspensions. At present, the high-speed rail seats and the first and second vertical suspensions The method of damping ratio design cannot provide a guiding innovation theory, and cannot meet the development of shock absorber design requirements under the condition of continuous speed increase of rail vehicles
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[0024] specific implementation plan
[0025] The present invention will be further described in detail through an embodiment below.
[0026] The unloaded mass of a 1 / 4 single car body of a high-speed railway m 2 =14398kg, half of the mass of a single bogie frame m 1 =1379kg, 1 / 4 sum of mass of passengers in a single car m 3 =1593.8kg; The vertical equivalent stiffness K of the primary suspension 1 =2.74×10 6 N / m; the equivalent stiffness of the end connection of the primary vertical shock absorber K d1 =40×10 6 N / m; Vertical stiffness K of the secondary mount 2 =568.4kN / m; End connection stiffness K of the secondary vertical shock absorber d2 =20×10 6 N / m; vertical equivalent stiffness of seat suspension K 3 =566.27kN / m; the damping ratio of the vertical suspension to be designed is ξ 1 , where the equivalent damping coefficient of a series of vertical shock absorbers The damping ratio of the secondary vertical mount to be designed is ξ 2 , where the equivalent da...
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The invention relates to a collaborative optimization method for damping ratios of high-speed rail seat suspension, primary vertical suspension and secondary vertical suspension, and belongs to the technical field of suspension of high-speed rail vehicles. As a vertical vibration collaborative optimization simulation model of a seat suspension system, a primary vertical suspension system and a secondary vertical suspension system is set up, and rail vertical profile irregularity random input serves as input excitation, with the minimum root-mean-square value of seat vertical vibration acceleration as the design target, the optimal damping ratios of high-speed rail seat suspension, primary vertical suspension and secondary vertical suspension are obtained through optimization design. It can be known through design examples and SIMPACK simulation verification that the optimal damping ratios of the high-speed rail seat suspension system, the primary vertical suspension system and the secondary vertical suspension system can be obtained accurately and reliably through the method, and a reliable design method is provided for designing the damping ratios of high-speed rail seat suspension, primary vertical suspension and secondary vertical suspension. By means of the method, the design level of a high-speed rail vehicle suspension system can be improved, vehicle riding comfort is improved, the product design cycle is shortened, and the international market competitiveness of the rail vehicles in China is enhanced.
Description
technical field [0001] The invention relates to a high-speed rail vehicle mount, in particular to a method for synergistically optimizing the damping ratio of a high-speed rail seat and the vertical mounts of the first series and the second series. Background technique [0002] The damping ratio of the seat and the vertical suspension system of the first series and the second series has an important influence on the ride comfort of the high-speed rail. An important parameter on which the valve system parameters of the vertical shock absorber are based. However, according to the available information, since the high-speed rail is a multi-degree-of-freedom vibration system, it is very difficult to perform dynamic analysis and calculation on it. The theoretical design method of the system is not given, and most of the seat suspension, primary vertical suspension and secondary vertical suspension are studied separately, and with the help of computer technology, the multi-body d...
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Inventor 周长城于曰伟
Owner SHANDONG UNIV OF TECH
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