Steel plate spring dynamic-simulation method
A dynamic simulation, leaf spring technology, applied in special data processing applications, instruments, electrical digital data processing and other directions, can solve the problems of inflexible change of design parameters, low simulation accuracy, unfavorable optimization work, etc., to achieve flexible design, High simulation accuracy and easy-to-change effects
Active Publication Date: 2011-07-20
CHERY AUTOMOBILE CO LTD
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Problems solved by technology
[0004] When treated as a flexible body, cumbersome conversion processes such as mesh division and modal analysis are required, and the design parameters are not flexible to change, which is not conducive to subsequent optimization work; the simplified method can only simulate several typical working conditions, and the simulation accuracy is not good. high
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[0019] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.
[0020] The invention introduces the discrete beam structure principle into the establishment of the simulation model of the leaf spring, which not only simplifies the model establishment process but also ensures the simulation accuracy. Its principle and process are as follows:
[0021] (1) Each leaf spring is considered to be composed of multiple concentrated mass units, each mass unit is regarded as a rigid body, and two adjacent concentrated mass units of the same piece are connected by Massless Beam as a load bearing Elements that make up the discrete beam structure of the leaf spring. Massless Beam is a massless beam unit structure, which generates Beam force between two mass units while connecting two mass units.
[0022] (2) Beam force is used to define the interaction force and moment ...
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The invention relates to an automobile steel plate spring dynamic-simulation method, which comprises the following steps of: A, extracting a series of points as lumped mass units along the centerline of each leaf spring, and extracting central points of a front spring eye and a rear spring eye of a first leaf spring when the leaf spring is the first leaf spring, wherein the centerline is the line of intersection of a thickness direction and a width direction; B, sequentially connecting each point by using a Nonlinear Beam command in an Adams / Car environment to form a discrete beam structure of each leaf spring; C, independently producing a model of the spring eye of the first leaf spring, and connecting the model of the spring eye with the other lumped mass units by using a Massless Beam command of an Adams / View module; and D, defining a frictional force between spring leaves by using a VFORCE function in the Adams / View environment, and defining an impact force between the spring leaves by using an IMPACT function. The simulation method provided by the invention is flexibly designed and high in simulation accuracy; designing parameters are easy to change; and automobile designing efficiency is greatly improved.
Description
technical field [0001] The invention belongs to the technical field of automobile simulation, and relates to a leaf spring dynamics simulation method, which is applicable to the establishment of various leaf spring dynamics simulation models. Background technique [0002] Leaf spring is one of the most widely used elastic components in automobile suspension. The accuracy of its simulation model directly affects the accuracy of dynamic simulation analysis of suspension system and vehicle system. [0003] At present, the simulation modeling methods of leaf spring mainly include: (1) As a flexible body: use finite element software to calculate the mode of leaf spring, and then convert the finite element model into a mode-neutral file; (2) Simplify method: use million Joints or spherical joints connect the three sections of beams, then add fixed pairs at the connection between the middle beam and the axle, and add hinge pairs at the connection between the front and rear beams an...
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Login to View More IPC IPC(8): G06F17/50
CPCY02T90/00
Inventor宋广辉
OwnerCHERY AUTOMOBILE CO LTD