First, a quick answer is easy…. because the reality is dynamic! For sure, you may find affordable reasons for not doing it, like these:

Reason 1. It is not necessary, indeed

Reason 2. Static approach is good enough for us

Reason 3. Less expensive, of course

In order not to become boring, we are going to write the best reasons for calculating with realistic methods and showing some pictures to support our explanation:

Note: we are based on elevator carframe, where static and dynamic results in acting safety gears were compared. This study was developed by Diego Pascual, SAMAT expert on FEA.

 

CONCLUSIONS:

 

 

Finally, coming back to your “reasons” for not doing this kind of realistic calculations:

Reason 1. It is not necessary, indeed à ARE YOU SURE?

Reason 2. Static approach is good enough for us à ARE YOU SURE?

Reason 3. Less expensive, of course à ARE YOU SURE?

I hope you have answered three questions like me: àNO, because realistic calculations are the necessary approach you need and cheaper than a potential failure in service.

Thanks for paying attention.

Best regards.

Ingeniería SAMAT