Test loading lever system space motion simulation method
A technology of motion simulation and system space, applied in the direction of applying stable tension/pressure to test material strength, special data processing applications, instruments, etc., can solve the problems of complex loading system, misjudgment, and heavy workload of manual methods in large-scale tests
Pending Publication Date: 2019-08-13
CHINA AIRPLANT STRENGTH RES INST
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Problems solved by technology
The large-scale test loading system is complex, and the manual method has a large workload and the possibility of misjudgment. Therefore, collision problems have occurred in important high-load test conditions, which has brought certain risks
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[0015] The technical solution of the invention is further illustrated through specific examples.
[0016] Taking a certain leverage system as an example, take lever i as the research object (such as figure 1 shown): the left endpoint is i 1 , the right endpoint is i 2 , the middle point is i 3 , the middle point of the next lever connected to the left end point is j 3 , the middle point of the next lever connected to the right end point is k 3 .
[0017] The calculation method of the reference coordinate axis system of lever i is as follows:
[0018] Coordinate origin: O i = i 3
[0019] X direction:
[0020] Y direction:
[0021] Z direction:
[0022] In the calculation formula of the Y direction, j can also be 3 replace with k 3 , you can select the middle point of the next level lever connected by any end point of the left and right ends of the lever to perform coordinate transformation.
[0023] Take connector k as the research object (such as figure ...
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The invention provides a spatial motion simulation method for a test loading lever system, which comprises the following steps of: calculating coordinate position matrixes of levers and connecting pieces under different loading steps in a global coordinate system, and setting the coordinate position matrixes of the levers and the connecting piece parts in each loading step to realize the dynamic motion of the levers. New coordinate origins and coordinate axis systems of devices are calculated by combining the spatial coordinates of loading devices during loading. According to coordinate origins and coordinate axis systems of the devices, spatial positions of the loading devices can be quickly updated in CAD software to realize quick updating of the spatial position of the loading devices,interference / collision inspection is carried out on the updated loading equipment, the safety state of a loading system can be judged in advance, and an important auxiliary effect is achieved on testdesign.
Description
technical field [0001] The invention belongs to the design field of a test loading lever system, and in particular relates to a space motion simulation method for a test loading lever system. Background technique [0002] Civil aircraft often use a loading system including multi-level levers when conducting static structural tests. If the aircraft structure undergoes large deformation during the test, the lever system will also produce large displacements, which may cause internal collisions and interference. Collisions with other test facilities such as support systems are also possible. At present, in the experimental design, the experience of designers or manual operation in CAD software are mainly used to assist in the prediction of space operation safety. The large-scale test loading system is complex, and the manual method has a large workload and the possibility of misjudgment. Therefore, collision problems have occurred in important high-load test conditions, which ...
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Login to View More IPC IPC(8): G06F17/50G01N3/08
CPCG01N3/08G06F30/20
Inventor 万春华聂小华常亮
Owner CHINA AIRPLANT STRENGTH RES INST